MESON Chess Problem Database

Problem Display
PID: 11115 (1Q6/8/p7/8/8/2B5/rPK5/k7 w - - 0 1)

Adabashev, Mark Ivanovich

Shakhmaty v SSSR, 1936

1Q6/8/p7/8/8/2B5/rPK5/k7

#2

4 + 3

3310 2345 Chess Problems 1997
4883 Still More Fun with Chess Miniatures 2002
145 StrateGems 2008
15148 Sadier Collection 2014
5454 Near Snap 2019
133 The Problemist Supplement 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb2+
      • 2.Qxb2#
  • Tries
    • 1.Qb4?
      • 1...Rxb2+
        • 2.Qxb2#
      • 1...Ra3
        • 2.Qxa3#
      • 1...Ra4
        • 2.Qxa4#
      • 1...Ra5
        • 2.Qxa5#
      • 1...a5!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg1#
      • 1...Rxb2+
        • 2.Bxb2#
      • 1...Ra3
        • 2.bxa3#
      • 1...Ra4
        • 2.b4#
      • 1...Ra5
        • 2.b4#

This anticipates 196659(2009)

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);CHECK,OGATE,P_SPINR(b),XP(A)::QAB1(D),XR(b)
  • Tries
    • Try
      • Q(D);
      • Vars
        • R(b);CHECK,OGATE,P_SPINR(b),XP(A)::QAB1(D),XR(b)
        • R(b);N_PINP(A),OGATEB::QAR2(D),XR(b)
        • R(b);N_PINP(A),OGATEB::QAR(D),XR(b)
      • Refutation
        • P(c);
  • Actual
    • Q(D);
    • Threat
      • QAR(D)
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XP(A)::B(C),XR(b)
      • R(b);N_PINP(A)::B(C)+P(A),XR(b)
      • R(b);N_PINP(A)::B(C)+P(A)
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