MESON Chess Problem Database

Problem Display
PID: 264231 (2KRrb1Q/2P1ppn1/4k1p1/6Pp/5BP1/1pNpN3/3P2P1/1Rr2B2 w - - 0 1)

Hoffmann, W?

Prace, 1961

2KRrb1Q/2P1ppn1/4k1p1/6Pp/5BP1/1pNpN3/3P2P1/1Rr2B2

#2

13 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd8+
      • 2.cxd8S#
    • 1...Sf5
      • 2.Qe5#
    • 1...f5
      • 2.Qg8#
    • 1...f6
      • 2.Qg8#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Sd4#
      • 1...Rxd8+
        • 2.cxd8S#
      • 1...Sxf5
        • 2.Qe5#
      • 1...f6
        • 2.Qg8#
      • 1...gxf5!
    • 1.Bxd3?
      • threat
        • 2.Bc4#
      • 1...Rxd8+
        • 2.cxd8S#
      • 1...Rxc3!
    • 1.Qxg7?
      • threat
        • 2.Qe5#
      • 1...Rxd8+
        • 2.cxd8S#
      • 1...f5
        • 2.Qxg6#
        • 2.Qg8#
      • 1...f6
        • 2.Qg8#
      • 1...Bxg7!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Sd4#
      • 1...Rxd8+
        • 2.cxd8S#
      • 1...Rxc2
        • 2.Re1#
      • 1...bxc2
        • 2.Rb6#
      • 1...dxc2
        • 2.Bc4#
      • 1...f5
        • 2.Qg8#
      • 1...f6
        • 2.Qg8#
      • 1...Sf5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(j);CHECK,OGATE,XR(L)::PXR(j)=S
    • S(i);OGATE::QAR1(M)
    • P(h);OGATEB::QAB(M)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • R(j);CHECK,OGATE,XR(L)::PXR(j)=S
        • S(i);OGATE,XS(F)::QAR1(M)
        • P(h);OGATEB::QAB(M)
      • Refutation
        • P(f);XS(F)
    • Try
      • B(B);XP(c)
      • Threat
        • B(B)
      • Vars
        • R(j);CHECK,OGATE,XR(L)::PXR(j)=S
      • Refutation
        • R(a);P_PINP(J),XS(E)
    • Try
      • Q(M);XS(i)
      • Threat
        • QAR1(M)
      • Vars
        • R(j);CHECK,OGATE,XR(L)::PXR(j)=S
        • P(h);OGATEB::QAB(M)
      • Refutation
        • B(k);XQ(M)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • R(j);CHECK,OGATE,XR(L)::PXR(j)=S
      • R(a);OGATE,XS(F)::R(A)
      • P(b);OGATE,XS(F)::R(A)
      • P(c);OGATE,XS(F)::B(B)
      • P(h);OGATEB::QAB(M)
      • S(i);OGATE::QAR1(M)
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