MESON Chess Problem Database

Problem Display
PID: 172450 (1b6/RpNQ4/1k6/8/8/8/K7/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

1b6/RpNQ4/1k6/8/8/8/K7/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sd5+?
      • 1...Kxa7
        • 2.Qa4#
      • 1...Kc5!
    • 1.Sa8+?
      • 1...Kxa7
        • 2.Qa4#
      • 1...Kc5!
    • 1.Rxb7+?
      • 1...Ka5
        • 2.Qb5#
      • 1...Kc5
        • 2.Qd5#
      • 1...Kxb7!
    • 1.Qb5+?
      • 1...Kxa7
        • 2.Qa5#
      • 1...Kxc7!
  • Keys
    • 1.Ra5!
      • 1...Kxa5
        • 2.Qb5#
      • 1...Bxc7
        • 2.Qb5#
      • 1...Ba7
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT,XR(B)::QAR(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT,XR(B)::QAR(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK,XP(b)
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR2(D)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XS(C)
  • Actual
    • R(B);
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAR1(D)
      • B(c);SBLOCK,XS(C)::QAR1(D)
      • B(c);SBLOCK::R1(B)
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