MESON Chess Problem Database

Problem Display
PID: 225680 (5NQ1/7R/B1PpP3/3kP3/Kp6/1Np2P2/1BRP4/8 w - - 0 1)

Pavlov, Mikhail Aleksandrovich

Praca, 1992

5NQ1/7R/B1PpP3/3kP3/Kp6/1Np2P2/1BRP4/8

#2

13 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qg5#
    • 1...cxd2
      • 2.e7#
  • Tries
    • 1.Kb5?
      • 1...Kxe5
        • 2.Qg5#
      • 1...cxd2
        • 2.Rxd2#
        • 2.e7#
      • 1...dxe5
        • 2.Rd7#
      • 1...cxb2!
    • 1.Bb5?
      • 1...Kxe5
        • 2.Qg5#
      • 1...cxd2
        • 2.Rxd2#
        • 2.e7#
      • 1...dxe5
        • 2.Rd7#
      • 1...cxb2!
    • 1.Rxc3?
      • 1...Kxe5
        • 2.Qg5#
      • 1...dxe5
        • 2.Rd7#
      • 1...bxc3!
    • 1.Rd7?
      • 1...Kxe5
        • 2.Qg5#
      • 1...cxb2
        • 2.Rc5#
      • 1...cxd2
        • 2.Rc5#
        • 2.Rxd6#
        • 2.e7#
      • 1...Kxc6!
    • 1.Qf7?
      • 1...Kxe5
        • 2.Rh5#
      • 1...Kxc6
        • 2.Qb7#
      • 1...cxd2
        • 2.e7#
      • 1...dxe5
        • 2.Qd7#
      • 1...cxb2!
    • 1.e7+?
      • 1...Kxe5
        • 2.Qg5#
      • 1...Kxc6!
  • Keys
    • 1.Qg1!
      • 1...Kxe5
        • 2.Qg5#
      • 1...Kxc6
        • 2.Bb7#
      • 1...cxb2
        • 2.Qd4#
      • 1...cxd2
        • 2.Qd4#
      • 1...dxe5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);OGATEB,P-FLIGHT,P_SPINP(a),XP(G)::QAR2(M)
    • P(a);XP(C)::QAB(M)+P(J)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Vars
        • K(c);OGATEB,P-FLIGHT,P_SPINP(a),XP(G)::QAR2(M)
        • P(d);OGATEB,SBLOCK,XP(G)::R(K)
      • Refutation
        • P(a);XB(A)
    • Try
      • B(H);
      • Vars
        • K(c);OGATEB,P-FLIGHT,P_SPINP(a),XP(G)::QAR2(M)
        • P(d);OGATEB,SBLOCK,XP(G)::R(K)
      • Refutation
        • P(a);XB(A)
    • Try
      • R(B);XP(a)
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(G)::QAR2(M)
        • P(d);OGATEB,SBLOCK,XP(G)::R(K)
      • Refutation
        • P(b);XR(B)
    • Try
      • R(K);P_PINP(d)
      • Vars
        • K(c);N_SPINP(d),OGATEB,P-FLIGHT,P_SPINP(a),XP(G)::QAR2(M)
        • P(a);OGATE,XB(A)::R1(B)
      • Refutation
        • K(c);N_SPINP(d),P_SPINP(a),S_FLIGHT,XP(I)
    • Try
      • Q(M);
      • Vars
        • K(c);OGATEB,P-FLIGHT,P_SPINP(a),XP(G)::R(K)
        • K(c);OGATEB,P_SPINP(a),S_FLIGHT,XP(I)::QAB1(M)
        • P(a);XP(C)::QAB(M)+P(J)
        • P(d);OGATEB,SBLOCK,XP(G)::QAR2(M)
      • Refutation
        • P(a);XB(A)
    • Try
      • P(J);CHECK
      • Vars
        • K(c);OGATEB,P-FLIGHT,P_SPINP(a),XP(G)::QAR2(M)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT,XP(I)
  • Actual
    • Q(M);
    • Vars
      • K(c);OGATEB,P-FLIGHT,P_SPINP(a),XP(G)::QAR2(M)
      • K(c);OGATEB,P_SPINP(a),S_FLIGHT,XP(I)::B(H)
      • P(a);XB(A)::QAR1(M)
      • P(a);XP(C)::QAR1(M)
      • P(d);N_GUARD,SBLOCK,XP(G)::QAR1(M)
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