MESON Chess Problem Database

Problem Display
PID: 10653 (8/6r1/3R4/1k4q1/8/1K1R3Q/8/8 w - - 0 1)

Zakhodyakin, Gleb Nikolaevich

Sovietsky Sport, 1966

8/6r1/3R4/1k4q1/8/1K1R3Q/8/8

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Qf5#
    • 1...Qf4
      • 2.R3d5#
    • 1...Qh4
      • 2.R3d5#
      • 2.Qf5#
    • 1...Qf6
      • 2.R3d5#
    • 1...Qh6
      • 2.R3d5#
      • 2.Qf5#
    • 1...Qe7
      • 2.R3d5#
    • 1...Qd8
      • 2.R3d5#
      • 2.Qf5#
    • 1...Qg4
      • 2.R3d5#
    • 1...Qd5+
      • 2.R3xd5#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qg6
      • 2.R3d5#
  • Tries
    • 1.Qd7+?
      • 1...Ka5
        • 2.Qa4#
      • 1...Kc5
        • 2.Rc3#
        • 2.Qc6#
      • 1...Rxd7!
    • 1.Qh4?
      • threat
        • 2.Qb4#
      • 1...Qd5+
        • 2.R3xd5#
      • 1...Ka5
        • 2.Qa4#
        • 2.Qb4#
      • 1...Kc5
        • 2.Qb4#
        • 2.Qc4#
      • 1...Qxh4
        • 2.R3d5#
      • 1...Qf4
        • 2.R3d5#
      • 1...Qg4
        • 2.R3d5#
      • 1...Qc5
        • 2.Qa4#
      • 1...Qd2!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qb4#
      • 1...Qd5+
        • 2.R3xd5#
      • 1...Ka5
        • 2.Qa4#
        • 2.Qb4#
      • 1...Kc5
        • 2.Qb4#
        • 2.Qc4#
      • 1...Qxg4
        • 2.R3d5#
      • 1...Qd2
        • 2.Qf5#
      • 1...Qf4
        • 2.R3d5#
      • 1...Qh4
        • 2.R3d5#
        • 2.Qf5#
      • 1...Qc5
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD::QAR(C)
    • Q(b);N_GUARD::R(B)
    • Q(b);CHECK,N_GUARD::R(B),XQ(b)
    • Q(b);N_GUARD::QAR(C),XQ(b)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • R(c);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • Q(b);CHECK,N_GUARD::R(B),XQ(b)
        • Q(b);N_GUARD,XQ(C)::R(B)
        • Q(b);N_GUARD::R(B)
        • Q(b);SBLOCK::QAB1(C)
      • Refutation
        • Q(b);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • Q(b);CHECK,N_GUARD::R(B),XQ(b)
      • Q(b);N_GUARD,XQ(C)::R(B)
      • Q(b);N_GUARD::QAR(C)
      • Q(b);N_GUARD::R(B)
      • Q(b);SBLOCK::QAB1(C)
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