MESON Chess Problem Database

Problem Display
PID: 6167 (4r1rB/6Pk/4pQ2/8/6P1/8/8/7K w - - 0 1)

Kainer, Cenek

Prager Presse, 1927

4r1rB/6Pk/4pQ2/8/6P1/8/8/7K

#2

5 + 4

5454 Near Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg7
      • 2.Qxg7#
  • Tries
    • 1.Qf5+?
      • 1...Kh6
        • 2.Qh5#
      • 1...exf5!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qh5#
      • 1...Kh6
        • 2.Qh5#
      • 1...Rxg7
        • 2.Qxg7#
      • 1...Rxh8
        • 2.g8S#
      • 1...Rgf8
        • 2.gxf8Q#

Anticipated by 159321(1915)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(d);OGATE,XP(D)::QAR1(C),XR(d)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • P(a);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • K(b);P-FLIGHT::QAR1(C)
      • R(d);OGATE,P_SPINR(d),XP(D)::QAR1(C),XR(d)
      • R(d);OGATE,SBLOCK,XB(E)::P=S
      • R(d);OGATE::PXR(d)=Q
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