MESON Chess Problem Database

Problem Display
PID: 51545 (K7/5R1Q/2k1P3/4n1N1/b1N5/1P6/3n1B2/3R4 w - - 0 1)

ten Cate, Pieter

The Guardian, 1964

K7/5R1Q/2k1P3/4n1N1/b1N5/1P6/3n1B2/3R4

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qe4#
  • Tries
    • 1.Rf3?
      • threat
        • 2.Qb7#
      • 1...Kb5
        • 2.Qb7#
      • 1...Kd5
        • 2.Qe4#
      • 1...Sexc4
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sf7!
    • 1.Rf4?
      • threat
        • 2.Qb7#
      • 1...Kb5
        • 2.Qb7#
      • 1...Kd5
        • 2.Qe4#
      • 1...Sexc4
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sf7!
    • 1.Rf6?
      • threat
        • 2.Qb7#
      • 1...Kb5
        • 2.Qb7#
      • 1...Kd5
        • 2.Qe4#
      • 1...Sexc4
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sf7!
    • 1.Ra7?
      • threat
        • 2.Qb7#
      • 1...Kb5
        • 2.Qb7#
      • 1...Kd5
        • 2.Qe4#
      • 1...Sexc4
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sf7!
    • 1.Rc7+?
      • 1...Kd5
        • 2.Rc5#
        • 2.Qe4#
      • 1...Kb5!
    • 1.Rf8?
      • threat
        • 2.Qb7#
      • 1...Kb5
        • 2.Qb7#
      • 1...Kd5
        • 2.Qe4#
      • 1...Sexc4
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sf7!
    • 1.Qe4+?
      • 1...Kb5
        • 2.Qb7#
      • 1...Sxe4!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qb7#
      • 1...Kb5
        • 2.Qb7#
      • 1...Kd5
        • 2.Qh1#
      • 1...Sexc4
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sf7
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(d);P_SPINS(a),S_FLIGHT::QAB1(H)
  • Tries
    • Try
      • R(G);
      • Threat
        • QAB1(H)
      • Vars
        • K(d);S_FLIGHT::QAR2(H)
        • K(d);P_SPINS(a),S_FLIGHT::QAB1(H)
        • S(c);N_GUARD,XS(D)::QAB1(H)
        • S(c);N_GUARD::QAB1(H),XS(c)
      • Refutation
        • S(c);
    • Try
      • R(G);
      • Threat
        • QAB1(H)
      • Vars
        • K(d);S_FLIGHT::QAR2(H)
        • K(d);P_SPINS(a),S_FLIGHT::QAB1(H)
        • S(c);N_GUARD,XS(D)::QAB1(H)
        • S(c);N_GUARD::QAB1(H),XS(c)
      • Refutation
        • S(c);
    • Try
      • R(G);
      • Threat
        • QAB1(H)
      • Vars
        • K(d);S_FLIGHT::QAR2(H)
        • K(d);P_SPINS(a),S_FLIGHT::QAB1(H)
        • S(c);N_GUARD,XS(D)::QAB1(H)
        • S(c);N_GUARD::QAB1(H),XS(c)
      • Refutation
        • S(c);
    • Try
      • R(G);
      • Threat
        • QAB1(H)
      • Vars
        • K(d);S_FLIGHT::QAR2(H)
        • K(d);P_SPINS(a),S_FLIGHT::QAB1(H)
        • S(c);N_GUARD,XS(D)::QAB1(H)
        • S(c);N_GUARD::QAB1(H),XS(c)
      • Refutation
        • S(c);
    • Try
      • R(G);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(G);
      • Threat
        • QAB1(H)
      • Vars
        • K(d);S_FLIGHT::QAR2(H)
        • K(d);P_SPINS(a),S_FLIGHT::QAB1(H)
        • S(c);N_GUARD,XS(D)::QAB1(H)
        • S(c);N_GUARD::QAB1(H),XS(c)
      • Refutation
        • S(c);
    • Try
      • Q(H);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::QAR2(H)
      • Refutation
        • S(a);XQ(H)
  • Actual
    • R(G);
    • Threat
      • QAB1(H)
    • Vars
      • K(d);P_SPINS(c),S_FLIGHT::QAR2(H)
      • K(d);P_SPINS(a),S_FLIGHT::QAB(H)
      • S(c);N_GUARD,XS(D)::QAB1(H)
      • S(c);N_GUARD::QAB1(H),XS(c)
      • S(c);OGATE::R1(G)
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