MESON Chess Problem Database

Problem Display
PID: 129761 (7K/8/Q7/1p6/8/4p3/4k2p/1r1RNR1r w - - 0 1)

Mottl, Josef

Svobodne Slovo, 1955

7K/8/Q7/1p6/8/4p3/4k2p/1r1RNR1r

#2

5 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qa2+?
      • 1...Kxd1
        • 2.Qc2#
      • 1...Kxf1
        • 2.Qg2#
      • 1...Rb2!
    • 1.Qg6?
      • threat
        • 2.Qd3#
      • 1...Kxd1
        • 2.Qc2#
      • 1...Kxf1
        • 2.Qg2#
      • 1...Rxd1
        • 2.Qg2#
      • 1...Rxf1
        • 2.Qc2#
      • 1...Rb3!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qf3#
      • 1...Kxd1
        • 2.Qc2#
      • 1...Kxf1
        • 2.Qg2#
      • 1...Rxd1
        • 2.Qg2#
      • 1...Rxf1
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK,N_PINP(f)
      • Vars
        • K(c);S_FLIGHT,XR(A)::QAB1(D)
        • K(c);OGATE,S_FLIGHT,XR(C)::QAB1(D)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(D);N_PINP(f)
      • Threat
        • QAB1(D)
      • Vars
        • K(c);S_FLIGHT,XR(A)::QAB1(D)
        • K(c);S_FLIGHT,XR(C)::QAB1(D)
        • R(a);SBLOCK,XR(A)::QAR2(D)
        • R(b);SBLOCK,XR(C)::QAR2(D)
      • Refutation
        • R(a);
  • Actual
    • Q(D);N_PINP(f)
    • Threat
      • QAB1(D)
    • Vars
      • K(c);S_FLIGHT,XR(A)::QAB1(D)
      • K(c);S_FLIGHT,XR(C)::QAB1(D)
      • R(a);SBLOCK,XR(A)::QAR2(D)
      • R(b);SBLOCK,XR(C)::QAR2(D)
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