MESON Chess Problem Database

Problem Display
PID: 261563 (4B1q1/2pQ2B1/3nNR2/7P/R2bk1p1/4nr2/K2PP3/8 w - - 0 1)

Kupper, Josef

Neue Zurcher Zeitung, 1954

4B1q1/2pQ2B1/3nNR2/7P/R2bk1p1/4nr2/K2PP3/8

#2

10 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6+
      • 2.Qxe6#
    • 1...Sc4
      • 2.Qxd4#
    • 1...Sb7
      • 2.Qxd4#
    • 1...Sf7
      • 2.Qxd4#
    • 1...Sc8
      • 2.Qxd4#
    • 1...Sxe8
      • 2.Qxd4#
  • Tries
    • 1.Rf4+?
      • 1...Kd5
        • 2.Raxd4#
        • 2.Rfxd4#
      • 1...Rxf4!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Re5#
      • 1...Qxe6+
        • 2.Qxe6#
      • 1...Kxf5
        • 2.Bg6#
      • 1...Qxg7
        • 2.Sc5#
      • 1...Rxf5
        • 2.Rxd4#
      • 1...Sexf5
        • 2.Qc6#
      • 1...Sdxf5
        • 2.d3#
      • 1...Sec4
        • 2.Sg5#
      • 1...Sdc4
        • 2.Sg5#
      • 1...Sf7
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(h);CHECK,OGATE,XS(F)::QAR2(H),XQ(h)
    • S(f);N_PINS(F),N_SPINB(c),OGATE::QAR1(H),XB(c)
    • S(f);OGATE::QAR1(H),XB(c)
    • S(f);N_PINS(F),OGATE::QAR1(H),XB(c)
    • S(f);OGATE,XB(J)::QAR1(H),XB(c)
  • Tries
    • Try
      • R(G);CHECK
      • Refutation
        • R(b);XR(G)
  • Actual
    • R(G);
    • Threat
      • R1(G)
    • Vars
      • Q(h);CHECK,OGATE,XS(F)::QAR2(H),XQ(h)
      • K(d);N_SPINB(c),OGATEB,S_FLIGHT,XR(G)::B(J)
      • Q(h);N_PINS(F),XB(I)::S(F)
      • R(b);SBLOCK,XR(G)::R1(D),XB(c)
      • S(a);N_GUARD,SBLOCK,XR(G)::QAB(H)
      • S(f);SBLOCK,XR(G)::P(B)
      • S(a);N_PINS(F),N_SPINB(c)::S(F)
      • S(f);N_PINS(F),N_SPINB(c)::S(F)
      • S(f);N_PINS(F)::S(F)
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