MESON Chess Problem Database

Problem Display
PID: 172447 (kN6/rR6/N7/3K4/Q7/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

kN6/rR6/N7/3K4/Q7/8/8/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb7
      • 2.Qc6#
    • 1...Rxa6
      • 2.Qxa6#
  • Tries
    • 1.Kc4?
      • 1...Kxb7
        • 2.Qc6#
      • 1...Rxa6
        • 2.Qxa6#
      • 1...Rxb7!
    • 1.Kd4?
      • 1...Kxb7
        • 2.Qc6#
      • 1...Rxa6
        • 2.Qxa6#
      • 1...Rxb7!
    • 1.Ke4?
      • 1...Kxb7
        • 2.Qc6#
      • 1...Rxa6
        • 2.Qxa6#
      • 1...Rxb7!
    • 1.Kc5?
      • 1...Kxb7
        • 2.Qc6#
      • 1...Rxa6
        • 2.Qxa6#
      • 1...Rxb7!
    • 1.Ke5?
      • 1...Kxb7
        • 2.Qc6#
      • 1...Rxa6
        • 2.Qxa6#
      • 1...Rxb7!
    • 1.Kc6?
      • threat
        • 2.Sc7#
      • 1...Rxa6+
        • 2.Qxa6#
      • 1...Rxb7!
    • 1.Kd6?
      • 1...Rxa6+
        • 2.Qxa6#
      • 1...Kxb7
        • 2.Qc6#
      • 1...Rxb7!
    • 1.Ke6?
      • 1...Rxa6+
        • 2.Qxa6#
      • 1...Kxb7
        • 2.Qc6#
      • 1...Rxb7!
    • 1.Sc5?
      • threat
        • 2.Qxa7#
      • 1...Ra5
        • 2.Qxa5#
      • 1...Ra6
        • 2.Qxa6#
      • 1...Rxa4!
    • 1.Sc6?
      • threat
        • 2.Rxa7#
        • 2.Rb8#
      • 1...Rxa6
        • 2.Rb8#
        • 2.Qxa6#
      • 1...Rxb7
        • 2.Sc7#
      • 1...Kxb7!
    • 1.Qb5?
      • threat
        • 2.Sc7#
      • 1...Rxa6
        • 2.Qxa6#
      • 1...Rxb7!
    • 1.Qc6?
      • threat
        • 2.Sc7#
      • 1...Rxa6
        • 2.Qxa6#
      • 1...Rxb7!
    • 1.Qc4?
      • 1...Kxb7
        • 2.Qc6#
      • 1...Rxa6
        • 2.Qxa6#
      • 1...Rxb7!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Rb8#
      • 1...Kxb7
        • 2.Qc6#
      • 1...Rxa6
        • 2.Qxa6#
      • 1...Rxb7
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
    • R(a);OGATE,P_SPINR(a),XS(C)::QAR2(A),XR(a)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
        • R(a);OGATE,P_SPINR(a),XS(C)::QAR2(A),XR(a)
      • Refutation
        • R(a);XR(D)
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
        • R(a);OGATE,P_SPINR(a),XS(C)::QAR2(A),XR(a)
      • Refutation
        • R(a);XR(D)
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
        • R(a);OGATE,P_SPINR(a),XS(C)::QAR2(A),XR(a)
      • Refutation
        • R(a);XR(D)
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
        • R(a);OGATE,P_SPINR(a),XS(C)::QAR2(A),XR(a)
      • Refutation
        • R(a);XR(D)
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
        • R(a);OGATE,P_SPINR(a),XS(C)::QAR2(A),XR(a)
      • Refutation
        • R(a);XR(D)
    • Try
      • K(B);S_FLIGHT
      • Threat
        • S(C)
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XS(C)::QAR2(A),XR(a)
      • Refutation
        • R(a);XR(D)
    • Try
      • K(B);P-FLIGHT
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XS(C)::QAR2(A),XR(a)
        • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
      • Refutation
        • R(a);XR(D)
    • Try
      • K(B);S_FLIGHT
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XS(C)::QAR2(A),XR(a)
        • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
      • Refutation
        • R(a);XR(D)
    • Try
      • S(C);P_PINR(a)
      • Threat
        • QAR1(A),XR(a)
      • Vars
        • R(a);OGATEB,P_PINS(C)::QAR(A),XR(a)
        • R(a);OGATEB::QAR2(A),XR(a)
      • Refutation
        • R(a);N_SPINR(a),XQ(A)
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);SBLOCK,XR(D)::QAR(A)+S(C),DCHECK
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • Q(A);
      • Threat
        • S(C)
      • Vars
        • R(a);OGATE,XS(C)::QAR2(A),XR(a)
      • Refutation
        • R(a);XR(D)
    • Try
      • Q(A);
      • Threat
        • S(C)
      • Vars
        • R(a);OGATE,XS(C)::QAR2(A),XR(a)
      • Refutation
        • R(a);P_SPINR(a),XR(D)
    • Try
      • Q(A);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
        • R(a);OGATE,XS(C)::QAR2(A),XR(a)
      • Refutation
        • R(a);XR(D)
  • Actual
    • S(E);
    • Threat
      • R1(D)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
      • R(a);OGATE,P_SPINR(a),XS(C)::QAR2(A),XR(a)
      • R(a);SBLOCK,XR(D)::QAR(A)+S(C),DCHECK
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