MESON Chess Problem Database

Problem Display
PID: 159170 (4K3/2p1n3/R2b2nR/3kpp2/2r3N1/8/B1P1N3/4Q3 w - - 0 1)

Ancin, Andrej

Praca, 1954

4K3/2p1n3/R2b2nR/3kpp2/2r3N1/8/B1P1N3/4Q3

#2

8 + 8

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qh1#
    • 1...Kc5
      • 2.Qa5#
    • 1...Ke6
      • 2.Sf4#
    • 1...Bc5
      • 2.Sf6#
  • Tries
    • 1.Sc3+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Ke6
        • 2.Qxe5#
      • 1...Kc5!
    • 1.Sf6+?
      • 1...Kc5
        • 2.Qa5#
      • 1...Ke6!
    • 1.Qd2+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qa5#
      • 1...Ke6!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxc4#
      • 1...Ke4
        • 2.Sf6#
        • 2.Qd3#
      • 1...Kc5
        • 2.Qa5#
        • 2.Qxc4#
      • 1...Ke6
        • 2.Qxe5#

There are these versions: 135674

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • K(b);N_SPINR(a),S_FLIGHT::QAB(A)
    • K(b);N_SPINR(a),P-FLIGHT::QAR2(A)
    • K(b);P_SPINB(e),P_SPINS(f),S_FLIGHT::S(D)
    • B(e);SBLOCK::S(E)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(b);N_SPINR(a),P-FLIGHT::QAB1(A)
        • K(b);P_SPINB(e),P_SPINP(c),P_SPINS(f),S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(b);N_SPINR(a),P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);P_SPINB(e),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINR(a),S_FLIGHT::QAB1(A)
        • K(b);N_SPINR(a),P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);P_SPINB(e),P_SPINS(f),S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XR(a)
    • Vars
      • K(b);P_SPINB(e),P_SPINS(f),S_FLIGHT::QAR1(A),XP(c)
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