Author: Jon Dart
Date: 15:31:17 07/11/04
in this position:
[D] r4rk1/p7/1ppQP3/1q5p/3Pp1p1/4P3/P4P2/4K1RR w - -
White (human player) played Rg2.
Crafty thinks e7 draws:
30. Rg2
({15:-2.67} 30. Rg2 Qb1+ 31. Kd2 Qxa2+ 32. Ke1 Qa1+ 33. Ke2
Qb2+ 34. Ke1 Qb1+ 35. Kd2 Qd3+ 36. Ke1 Qc3+ 37. Kd1 Qb3+ 38. Ke1 Rad8 39. Qh2
Qb1+ 40. Kd2 Qd3+ 41. Kc1 Qc4+ 42. Kb1 Rf5 $19)
({15:+0.00} 30. e7 Qb1+ 31. Ke2 Qxa2+ 32. Ke1 Qb1+ 33. Ke2 Qb2+
34. Ke1 Qc1+ 35. Ke2 Qc2+ 36. Ke1 Qxf2+ 37. Kd1 Qf3+ 38. Kd2 Qf2+ 39. Kd1 $10)
({15:-0.96} 30. Qh2 Qb1+ 31. Ke2 Qxa2+ 32. Kf1 Qa1+ 33. Ke2
Qb2+ 34. Ke1 Qb1+ 35. Ke2 Qb5+ 36. Kd2 Qb4+ 37. Ke2 Rf5 38. Rxg4+ Kf8 39. Rxe4
Qc4+ 40. Kd2 Qa2+ 41. Kc3 Qa3+ 42. Kc2 $17)
({14:-2.50} 30. Rh2 Qb1+ 31. Ke2 Qxa2+ 32. Kf1 Qc4+ 33. Kg2 Qe2
34. Rf1 Rad8 35. Qe7 Rd5 36. Kg1 b5 37. Qxa7 b4 38. Rh4 $19)
Quite a few programs, including Pharaon and some versions of mine,
want to play Qh2, which may also be drawing, I'm not sure. It seems
Rg2 is not as good, however the continuation was this:
.. Qb1+ 31. Ke2 Qxa2+ 32. Ke1 Qb1+ 33. Ke2 Qa2+ 34. Ke1 Qb1+
35. Ke2 Qd3+ 36. Ke1 Qc3+ 37. Ke2 Qc2+ 38. Ke1 Qc1+ 39. Ke2 Qc2+
and it looked like a perpetual, so I offered a draw (manually). So it
looks like possibly Rg2 draws too, but it's hard to see because of all
the different checks possible. My latest version of Arasan plays e7
for White here but does not return a draw score (it is about -1.30).
Do any programs quickly get a draw score, or find a forcing line that
does not draw?
--Jon
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