MESON Chess Problem Database

Problem Display
PID: 172378 (7k/5r1p/5P1N/7K/8/8/8/B7 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1997

7k/5r1p/5P1N/7K/8/8/8/B7

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf6
      • 2.Bxf6#
    • 1...Re7
      • 2.fxe7#
    • 1...Rg7
      • 2.fxg7#
    • 1...Rf8
      • 2.f7#
  • Tries
    • 1.Bd4?
      • 1...Rxf6
        • 2.Bxf6#
      • 1...Rb7
        • 2.f7#
      • 1...Ra7
        • 2.f7#
      • 1...Rc7
        • 2.f7#
      • 1...Re7
        • 2.fxe7#
      • 1...Rg7
        • 2.fxg7#
      • 1...Rf8
        • 2.f7#
      • 1...Rd7!
  • Keys
    • 1.Be5!
      • 1...Rxf6
        • 2.Bxf6#
      • 1...Rb7
        • 2.f7#
      • 1...Ra7
        • 2.f7#
      • 1...Rc7
        • 2.f7#
      • 1...Rd7
        • 2.f7#
      • 1...Re7
        • 2.fxe7#
      • 1...Rg7
        • 2.fxg7#
      • 1...Rf8
        • 2.f7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
    • R(a);OGATE::B(A)+P(C),XR(a)
    • R(a);OGATE::P(C),XR(a)
    • R(a);OGATE::B(A)+P(C)
  • Tries
    • Try
      • B(A);
      • Vars
        • R(a);OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
        • R(a);OGATE::B(A)+P(C)
        • R(a);OGATE::B(A)+P(C),XR(a)
        • R(a);OGATE::P(C),XR(a)
      • Refutation
        • R(a);
  • Actual
    • B(A);
    • Vars
      • R(a);OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
      • R(a);OGATE::B(A)+P(C)
      • R(a);OGATE::B(A)+P(C),XR(a)
      • R(a);OGATE::P(C),XR(a)
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