MESON Chess Problem Database

Problem Display
PID: 172274 (1k6/3r4/Q1KP2N1/8/8/6B1/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

1k6/3r4/Q1KP2N1/8/8/6B1/8/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6+
      • 2.Bxd6#
    • 1...Rb7
      • 2.Qxb7#
    • 1...Rc7+
      • 2.dxc7#
    • 1...Re7
      • 2.dxe7#
    • 1...Rg7
      • 2.d7#
    • 1...Rh7
      • 2.d7#
    • 1...Rd8
      • 2.Qb7#
      • 2.d7#
  • Tries
    • 1.Be5?
      • 1...Rxd6+
        • 2.Bxd6#
      • 1...Rc7+
        • 2.dxc7#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Rf7
        • 2.d7#
      • 1...Re7
        • 2.dxe7#
      • 1...Rg7
        • 2.d7#
      • 1...Rh7
        • 2.d7#
      • 1...Rd8
        • 2.Qb7#
        • 2.d7#
      • 1...Ra7!
    • 1.Qc8+?
      • 1...Ka7
        • 2.Bf2#
      • 1...Kxc8!
  • Keys
    • 1.Se7!
      • 1...Rxd6+
        • 2.Bxd6#
      • 1...Rc7+
        • 2.dxc7#
      • 1...Rxe7
        • 2.dxe7#
      • 1...Ra7
        • 2.Qc8#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Rd8
        • 2.Qb7#
        • 2.d7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(a);CHECK,OGATE,P_SPINR(a),XP(D)::B(A),XR(a)
    • R(a);N_GUARD::QAR1(B),XR(a)
    • R(a);CHECK,OGATE::P(D),XR(a)
    • R(a);OGATE::B(A)+P(D),XR(a)
    • R(a);OGATE::B(A)+P(D)
  • Tries
    • Try
      • B(A);
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XP(D)::B(A),XR(a)
        • R(a);CHECK,OGATE::P(D),XR(a)
        • R(a);N_GUARD::QAR1(B),XR(a)
        • R(a);OGATE::B(A)+P(D)
        • R(a);OGATE::B(A)+P(D),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
  • Actual
    • S(E);
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XP(D)::B(A),XR(a)
      • R(a);CHECK,OGATE::P(D),XR(a)
      • R(a);OGATE,XS(E)::B(A)+P(D),XR(a)
      • R(a);SBLOCK::QAR1(B)
      • R(a);N_GUARD::QAR1(B),XR(a)
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