MESON Chess Problem Database

Problem Display
PID: 241375 (8/4K3/3Q4/k1p1R3/8/bpr5/1N6/R7 w - - 0 1)

Gavrilov, Constantin Grigorievich

La Strategia, 1936

8/4K3/3Q4/k1p1R3/8/bpr5/1N6/R7

#2

5 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Qb6#
  • Tries
    • 1.Rxc5+?
      • 1...Kb4
        • 2.Qb6#
      • 1...Rxc5!
    • 1.Qb8?
      • threat
        • 2.Rxa3#
      • 1...Ka6
        • 2.Rxa3#
      • 1...Rc4!
    • 1.Qa6+?
      • 1...Kb4
        • 2.Qa4#
        • 2.Qb6#
      • 1...Kxa6!
  • Keys
    • 1.Re6!
      • threat
        • 2.Qb6#
      • 1...Kb4
        • 2.Qb6#
      • 1...Kb5
        • 2.Qb6#
      • 1...c4
        • 2.Re5#
        • 2.Qc5#

There are these versions: 61685

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);N_SPINB(a),S_FLIGHT::QAR2(D)
  • Tries
    • Try
      • R(C);CHECK,XP(e)
      • Vars
        • K(d);N_SPINB(a),S_FLIGHT::QAR2(D)
      • Refutation
        • R(c);XR(C)
    • Try
      • Q(D);
      • Threat
        • R(A),XB(a)
      • Vars
        • K(d);N_SPINP(e),P-FLIGHT::R(A),XB(a)
      • Refutation
        • R(c);
    • Try
      • Q(D);CHECK
      • Refutation
        • K(d);N_SPINP(e),P-FLIGHT,XQ(D)
  • Actual
    • R(C);N_PINP(e)
    • Threat
      • QAB1(D)
    • Vars
      • K(d);N_SPINB(a),P_SPINP(e),S_FLIGHT::QAR2(D)
      • K(d);N_SPINB(a),P-FLIGHT::QAR1(D)
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