MESON Chess Problem Database

Problem Display
PID: 78804 (1r1rkNqR/2PR1p2/p3PPPb/2Q2n2/8/Kb6/3p4/8 w - - 0 1)

Burda, Josef

Resitelsky zpavodaj, 2002

1r1rkNqR/2PR1p2/p3PPPb/2Q2n2/8/Kb6/3p4/8

#2

9 + 10

6168 Czech Album (2001-2003) 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf8
      • 2.gxf7#
    • 1...Qxh8
      • 2.gxf7#
    • 1...Rb4
      • 2.Rxd8#
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...Rb5
      • 2.Rxd8#
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...Rb6
      • 2.Rxd8#
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...Rb7
      • 2.Rxd8#
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...Rxd7
      • 2.exd7#
    • 1...Se3
      • 2.Qe7#
    • 1...Sg3
      • 2.Qe7#
    • 1...Sd4
      • 2.Qe7#
    • 1...Sh4
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
    • 1...Sg7
      • 2.Qe7#
  • Tries
    • 1.Re7+?
      • 1...Sxe7
        • 2.Qxe7#
      • 1...Kxf8!
    • 1.Rxg8?
      • threat
        • 2.gxf7#
      • 1...Rxd7
        • 2.exd7#
      • 1...fxe6
        • 2.f7#
      • 1...fxg6
        • 2.f7#
      • 1...Sd6
        • 2.Re7#
      • 1...Bxe6!
    • 1.Qb5?
      • threat
        • 2.Rxd8#
      • 1...Qxf8+
        • 2.Re7#
      • 1...Bxf8+
        • 2.Re7#
      • 1...Kxf8
        • 2.Rxf7#
      • 1...Rxd7
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...Rdc8
        • 2.Rd8#
      • 1...axb5!
    • 1.cxb8Q?
      • threat
        • 2.Rxd8#
        • 2.Qxd8#
      • 1...d1Q
        • 2.Qxd8#
      • 1...d1R
        • 2.Qxd8#
      • 1...Rc8
        • 2.Qcxc8#
        • 2.Qbxc8#
      • 1...Rxb8!
    • 1.cxb8R?
      • threat
        • 2.Rdxd8#
        • 2.Rbxd8#
      • 1...d1Q
        • 2.Rbxd8#
      • 1...d1R
        • 2.Rbxd8#
      • 1...Rc8
        • 2.Rxc8#
        • 2.Qxc8#
      • 1...Rxb8!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Rxd8#
      • 1...Qxf8+
        • 2.Re7#
      • 1...Bxf8+
        • 2.Re7#
      • 1...Kxf8
        • 2.Rxf7#
      • 1...Rxd7
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...Rdc8
        • 2.Rxf7#
        • 2.Rd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(j);N_GUARD,P_PINQ(B),P_SPINQ(j),XS(H)::P(E),XP(f)
    • Q(j);N_GUARD,XR(I)::P(E),XP(f)
    • R(h);OGATE,XR(G)::P(C),XR(h)
    • S(c);N_GUARD::QAR1(B)
    • S(c);N_GUARD::QAR1(B),XS(c)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • S(c);OGATE,XR(G)::QAR1(B),XS(c)
      • Refutation
        • K(i);P-FLIGHT,P_SPINQ(j),XS(H)
    • Try
      • R(I);XQ(j)
      • Threat
        • P(E),XP(f)
      • Vars
        • R(h);OGATE,XR(G)::P(C),XR(h)
        • P(f);OGATE,XP(C)::P(D)
        • P(f);OGATE,XP(E)::P(D)
        • S(c);N_GUARD::R1(G)
      • Refutation
        • B(b);XP(C)
    • Try
      • Q(B);
      • Threat
        • QAB(B)+R(G),DCHECK,XR(h)
      • Vars
        • Q(j);CHECK,P_SPINQ(j),XS(H)::QAB(B)+R(G),DCHECK
        • B(e);CHECK,SBLOCK,XS(H)::QAB(B)+R(G),DCHECK
        • K(i);P-FLIGHT,P_SPINQ(j),XS(H)::R1(G),XP(f)
        • R(h);P_SPINR(h),XR(G)::PXR(g)=Q
        • R(h);::QAB(B)+R(G),DCHECK
      • Refutation
        • P(d);XQ(B)
    • Try
      • P(F);P_PINR(h),XR(g)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR1(F),XR(h)
      • Refutation
        • R(h);N_SPINR(h),XQ(F)
    • Try
      • P(F);P_PINR(h),XR(g)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::R1(F),XR(h)
      • Refutation
        • R(h);N_SPINR(h),XR(F)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+R(G),DCHECK,XR(h)
    • Vars
      • Q(j);CHECK,P_SPINQ(j),XS(H)::QAB(B)+R(G),DCHECK
      • B(e);CHECK,SBLOCK,XS(H)::QAB(B)+R(G),DCHECK
      • K(i);P-FLIGHT,P_SPINQ(j),XS(H)::R1(G),XP(f)
      • R(h);P_SPINR(h),XR(G)::PXR(g)=Q
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