MESON Chess Problem Database

Problem Display
PID: 15944 (k2K4/3P4/1Q6/8/1B6/8/1R6/q7 w - - 0 1)

Pypa, Volodimir Iosifovich

Sp. Prize=, Serp i molot, 1989

k2K4/3P4/1Q6/8/1B6/8/1R6/q7

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Ra2#
    • 1...Qg1
      • 2.Ra2#
    • 1...Qh1
      • 2.Ra2#
    • 1...Qa2
      • 2.Rxa2#
  • Tries
    • 1.Ba3?
      • threat
        • 2.Qa5#
        • 2.Qa6#
        • 2.Qb7#
        • 2.Qb8#
      • 1...Qxa3
        • 2.Qb7#
        • 2.Qb8#
      • 1...Qe1
        • 2.Qa6#
        • 2.Qb7#
        • 2.Qb8#
      • 1...Qf1
        • 2.Qb7#
        • 2.Qb8#
      • 1...Qg1
        • 2.Qb7#
        • 2.Qb8#
      • 1...Qh1
        • 2.Qa5#
        • 2.Qa6#
        • 2.Qb8#
      • 1...Qxb2!
    • 1.Ba5?
      • threat
        • 2.Qa6#
        • 2.Qb7#
        • 2.Qb8#
      • 1...Qxa5
        • 2.Qxa5#
      • 1...Qf1
        • 2.Qb7#
        • 2.Qb8#
      • 1...Qg1
        • 2.Qb7#
        • 2.Qb8#
      • 1...Qh1
        • 2.Qa6#
        • 2.Qb8#
      • 1...Qxb2!
    • 1.Bd6?
      • threat
        • 2.Qb7#
        • 2.Qb8#
      • 1...Qxb2
        • 2.Qa6#
      • 1...Qh1
        • 2.Ra2#
        • 2.Qa5#
        • 2.Qa6#
        • 2.Qb8#
      • 1...Qa5
        • 2.Qxa5#
      • 1...Qa6
        • 2.Qxa6#
        • 2.Qb8#
      • 1...Qa7!
    • 1.Qa6+?
      • 1...Kb8
        • 2.Bd6#
      • 1...Qxa6!
    • 1.Qc6+?
      • 1...Ka7
        • 2.Bc5#
      • 1...Kb8!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Qc6#
        • 2.Qb7#
        • 2.Qb8#
      • 1...Qxb2
        • 2.Qa7#
      • 1...Qa7
        • 2.Qxa7#
      • 1...Qh1
        • 2.Ra2#
        • 2.Qa5#
        • 2.Qa7#
        • 2.Qa6#
        • 2.Qb8#
      • 1...Qa4
        • 2.Qb7#
        • 2.Qb8#
      • 1...Qa5
        • 2.Qxa5#
      • 1...Qa6
        • 2.Qxa6#
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::R(A)
    • Q(a);N_GUARD::R(A),XQ(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • DUALS(4)
      • Refutation
        • Q(a);XR(A)
    • Try
      • B(B);
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);OGATE,P_PINQ(C),XB(B)::QAR(C),XQ(a)
      • Refutation
        • Q(a);XR(A)
    • Try
      • B(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);N_GUARD,XR(A)::QAR2(C)
        • Q(a);N_GUARD,P_PINQ(C)::QAR(C),XQ(a)
      • Refutation
        • Q(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::R(A)+B(B),DCHECK
      • Refutation
        • Q(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::B(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • B(B);
    • Threat
      • DUALS(3)
    • Vars
      • Q(a);N_GUARD,XR(A)::QAR1(C)
      • Q(a);N_GUARD::QAR1(C),XQ(a)
      • Q(a);N_GUARD,P_PINQ(C)::QAR(C),XQ(a)
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Developed and maintained by Brian Stephenson.
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