MESON Chess Problem Database

Problem Display
PID: 186638 (N7/1N2p3/2P1P1p1/3k1pKb/P2b1Pp1/3Q2R1/8/8 w - - 0 1)

Lucio, Ther

Chess, 1959

N7/1N2p3/2P1P1p1/3k1pKb/P2b1Pp1/3Q2R1/8/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qb5#
    • 1...Kxe6
      • 2.Qc4#
      • 2.Qb3#
  • Tries
    • 1.Sd8?
      • 1...Kd6
        • 2.Qxd4#
      • 1...Kc5!
    • 1.Sb6+?
      • 1...Kxe6
        • 2.Qc4#
        • 2.Qb3#
      • 1...Kxc6!
    • 1.Rg1?
      • 1...Kxc6
        • 2.Qb5#
      • 1...Kxe6
        • 2.Qc4#
        • 2.Qb3#
      • 1...g3!
    • 1.Rg2?
      • 1...Kxc6
        • 2.Qb5#
      • 1...Kxe6
        • 2.Qc4#
        • 2.Qb3#
      • 1...g3!
    • 1.Re3?
      • 1...Kxc6
        • 2.Qb5#
      • 1...g3!
    • 1.Qc4+?
      • 1...Ke4
        • 2.Sc5#
      • 1...Kxc4!
    • 1.Qd2?
      • 1...Ke4
        • 2.Qg2#
      • 1...Kxc6
        • 2.Qg2#
      • 1...Kxe6
        • 2.Qa2#
      • 1...Kc4!
    • 1.Qb3+?
      • 1...Kxc6
        • 2.Qb5#
      • 1...Ke4!
    • 1.Qf3+?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe6
        • 2.Qb3#
      • 1...gxf3!
    • 1.Qxd4+?
      • 1...Kxc6
        • 2.Sa5#
        • 2.Sd8#
        • 2.Qd7#
      • 1...Kxe6
        • 2.Sd8#
        • 2.Qc4#
      • 1...Kxd4!
    • 1.a5?
      • 1...Kxe6
        • 2.Qc4#
        • 2.Qb3#
      • 1...Kxc6!
    • 1.c7?
      • 1...Kc6
        • 2.Qb5#
      • 1...Kxe6!
  • Keys
    • 1.Qd1!
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qh1#
      • 1...Kxc6
        • 2.Qh1#
      • 1...Kxe6
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINB(a),S_FLIGHT,XP(F)::QAB1(A)
  • Tries
    • Try
      • S(H);
      • Vars
        • K(c);P-FLIGHT::QAR2(A),XB(a)
      • Refutation
        • K(c);N_SPINB(a),P-FLIGHT
    • Try
      • S(I);CHECK
      • Refutation
        • K(c);N_SPINB(a),S_FLIGHT,XP(F)
    • Try
      • R(B);
      • Vars
        • K(c);N_SPINB(a),S_FLIGHT,XP(F)::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • R(B);
      • Vars
        • K(c);N_SPINB(a),S_FLIGHT,XP(F)::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • R(B);
      • Vars
        • K(c);N_SPINB(a),S_FLIGHT,XP(F)::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK,N_PINB(a)
      • Vars
        • K(c);P_SPINB(a),S_FLIGHT::S(H)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Vars
        • K(c);N_SPINB(a),S_FLIGHT::QAB(A)
        • K(c);N_SPINB(a),S_FLIGHT,XP(F)::QAB(A)
        • K(c);N_SPINB(a),S_FLIGHT,XP(G)::QAB(A)
      • Refutation
        • K(c);N_SPINB(a),S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINB(a)
      • Vars
        • K(c);S_FLIGHT,XP(F)::QAB1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINB(a)
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
        • K(c);S_FLIGHT,XP(G)::QAB(A)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);CHECK,XB(a)
      • Refutation
        • K(c);P-FLIGHT,XQ(A)
    • Try
      • P(C);
      • Refutation
        • K(c);N_SPINB(a),S_FLIGHT,XP(F)
    • Try
      • P(F);
      • Vars
        • K(c);N_SPINB(a),S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);N_SPINB(a),S_FLIGHT,XP(G)
  • Actual
    • Q(A);
    • Vars
      • K(c);N_SPINB(a),S_FLIGHT::QAB1(A)
      • K(c);N_SPINB(a),S_FLIGHT::QAB(A)
      • K(c);N_SPINB(a),S_FLIGHT,XP(F)::QAB(A)
      • K(c);N_SPINB(a),S_FLIGHT,XP(G)::QAB(A)
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