MESON Chess Problem Database

Problem Display
PID: 99365 (r3N2r/1P5P/n2PkP2/4Nn2/1pP5/4Q2B/7B/1K6 w - - 0 1)

Reitman, Mark

Sakkelet, 1993

r3N2r/1P5P/n2PkP2/4Nn2/1pP5/4Q2B/7B/1K6

#2

11 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8
      • 2.bxc8Q#
      • 2.bxc8B#
    • 1...Rg8
      • 2.hxg8Q#
      • 2.hxg8B#
  • Tries
    • 1.Sg7+?
      • 1...Kxd6
        • 2.Qb6#
      • 1...Kxf6!
    • 1.Qb6?
      • threat
        • 2.d7#
      • 1...Rc8
        • 2.bxc8Q#
        • 2.bxc8B#
      • 1...Sb8!
    • 1.Qh6?
      • threat
        • 2.f7#
      • 1...Rg8
        • 2.hxg8Q#
        • 2.hxg8B#
      • 1...Rxh7!
    • 1.d7?
      • threat
        • 2.Qb6#
      • 1...Rc8
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...Sb8
        • 2.d8S#
      • 1...Sc5!
    • 1.bxa8Q?
      • threat
        • 2.Qd5#
        • 2.Qc8#
      • 1...Rxh7
        • 2.Qd5#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sc7
        • 2.Qc8#
      • 1...Sb8
        • 2.Qd5#
      • 1...Rxe8!
  • Keys
    • 1.f7!
      • threat
        • 2.Qh6#
      • 1...Rxh7
        • 2.f8S#
      • 1...Rg8
        • 2.fxg8Q#
        • 2.fxg8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(e);OGATE::PXR(e)=Q
    • R(f);OGATE::PXR(f)=Q
  • Tries
    • Try
      • S(K);CHECK
      • Vars
        • K(d);N_SPINS(b),P-FLIGHT,XP(G)::QAR2(C)
      • Refutation
        • K(d);N_SPINS(b),P-FLIGHT,XP(H)
    • Try
      • Q(C);
      • Threat
        • QAR(C)+P(G)
      • Vars
        • R(e);OGATE::PXR(e)=Q
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Threat
        • QAR(C)+P(H)
      • Vars
        • R(f);OGATE::PXR(f)=Q
      • Refutation
        • R(f);XP(J)
    • Try
      • P(G);
      • Threat
        • QAR(C)
      • Vars
        • R(e);OGATE::PXR(e)=Q
        • S(c);S_CUTR(e)::P=S
      • Refutation
        • S(c);
    • Try
      • P(I);XR(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);XP(J)::QAB1(I)
        • S(c);::QAB1(I)
        • S(c);::QAB(I)
      • Refutation
        • R(f);XS(K)
  • Actual
    • P(H);
    • Threat
      • QAR(C)
    • Vars
      • R(f);N_GUARD,XP(J)::P=S
      • R(f);OGATE::PXR(f)=Q
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