MESON Chess Problem Database

Problem Display
PID: 261594 (B1R1K3/1b6/5b2/3knR2/3p4/8/2Q5/8 w - - 0 1)

Preiswerk, Walther Edouard

Neue Zurcher Zeitung, 1909

B1R1K3/1b6/5b2/3knR2/3p4/8/2Q5/8

#2

5 + 5

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6+
      • 2.Qxc6#
  • Tries
    • 1.Bxb7+?
      • 1...Kd6
        • 2.Rxf6#
      • 1...Ke6!
    • 1.Rc5+?
      • 1...Kd6
        • 2.Rxf6#
      • 1...Ke6!
    • 1.Qb3+?
      • 1...Kd6
        • 2.Rxf6#
      • 1...Ke4!
    • 1.Qa2+?
      • 1...Kd6
        • 2.Rxf6#
      • 1...Ke4!
    • 1.Qg2+?
      • 1...Kd6
        • 2.Rxf6#
      • 1...Ke6!
    • 1.Qc4+?
      • 1...Kd6
        • 2.Rxf6#
      • 1...Ke4!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Qg2#
      • 1...Bxc6+
        • 2.Qxc6#
      • 1...d3
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(e);CHECK,N_GUARD::QAB1(A),XB(e)
  • Tries
    • Try
      • B(C);CHECK,XB(e)
      • Vars
        • K(b);N_SPINS(c),P-FLIGHT,S_CUTS(c)::R(B),XB(d)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(b);N_SPINB(e),N_SPINS(c),P-FLIGHT::R(B),XB(d)
      • Refutation
        • K(b);N_SPINB(e),N_SPINS(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINB(e),N_SPINS(c),P-FLIGHT,S_CUTS(c)::R(B),XB(d)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINB(e),N_SPINS(c),P-FLIGHT,S_CUTS(c)::R(B),XB(d)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINB(e),N_SPINS(c),P-FLIGHT,S_CUTS(c)::R(B),XB(d)
      • Refutation
        • K(b);N_SPINB(e),N_SPINS(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINB(e),N_SPINS(c),P-FLIGHT,S_CUTS(c)::R(B),XB(d)
      • Refutation
        • K(b);N_SPINS(c),P_SPINP(a),S_FLIGHT
  • Actual
    • R(D);N_PINB(e)
    • Threat
      • QAB(A)
    • Vars
      • B(e);CHECK,OGATE,P_SPINB(e),XR(D)::QAB1(A),XB(e)
      • P(a);::QAB1(A)
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