MESON Chess Problem Database

Problem Display
PID: 176006 (8/8/Q4P2/2BNpp2/K1Brk3/3N2Pn/6P1/8 w - - 0 1)

Robert, Philippe

Probleemblad, 1978

8/8/Q4P2/2BNpp2/K1Brk3/3N2Pn/6P1/8

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4+
      • 2.Qxc4#
    • 1...Sg1
      • 2.Sf2#
    • 1...Sf2
      • 2.Sxf2#
    • 1...Sf4
      • 2.Sf2#
    • 1...Sg5
      • 2.Sf2#
  • Tries
    • 1.Qc6?
      • 1...Rxc4+
        • 2.S5b4#
      • 1...Rxd3
        • 2.Sc3#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Sg1
        • 2.Sf2#
      • 1...Sf2
        • 2.Sxf2#
      • 1...Sf4
        • 2.Sf2#
      • 1...Sg5
        • 2.Sf2#
      • 1...f4!
    • 1.Qa8?
      • 1...Rxc4+
        • 2.S5b4#
      • 1...Rxd3
        • 2.Sc3#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Sg1
        • 2.Sf2#
      • 1...Sf2
        • 2.Sxf2#
      • 1...Sf4
        • 2.Sf2#
      • 1...Sg5
        • 2.Sf2#
      • 1...f4!
    • 1.f7?
      • 1...Rxc4+
        • 2.Qxc4#
      • 1...Rxd3
        • 2.Sf6#
      • 1...f4
        • 2.Qg6#
      • 1...Sg1
        • 2.Sf2#
      • 1...Sf2
        • 2.Sxf2#
      • 1...Sf4
        • 2.Sf2#
      • 1...Sg5
        • 2.Sf2#
      • 1...Rxd5!
  • Keys
    • 1.Qb7!
      • 1...Rxc4+
        • 2.S5b4#
      • 1...Rxd3
        • 2.Sc3#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...f4
        • 2.Qh7#
      • 1...Sg1
        • 2.Sf2#
      • 1...Sf2
        • 2.Sxf2#
      • 1...Sf4
        • 2.Sf2#
      • 1...Sg5
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);CHECK,OGATE,XB(E)::QAR2(H),XR(b)
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
  • Tries
    • Try
      • Q(H);
      • Vars
        • R(b);CHECK,N_GUARD,XB(E)::QAB(H)+S(G)
        • R(b);N_PINB(E),XS(B)::QAB(H)+S(G),DCHECK
        • R(b);N_PINB(E),OGATE,P_SPINR(b),XS(G)::QAB1(H),XR(b)
        • S(a);N_GUARD::S(B)
        • S(a);N_GUARD::S(B),XS(a)
      • Refutation
        • P(e);
    • Try
      • Q(H);
      • Vars
        • R(b);CHECK,N_GUARD,XB(E)::QAB(H)+S(G)
        • R(b);N_PINB(E),XS(B)::QAB(H)+S(G),DCHECK
        • R(b);N_PINB(E),OGATE,P_SPINR(b),XS(G)::QAB1(H),XR(b)
        • S(a);N_GUARD::S(B)
        • S(a);N_GUARD::S(B),XS(a)
      • Refutation
        • P(e);
    • Try
      • P(I);
      • Vars
        • R(b);CHECK,OGATE,XB(E)::QAR2(H),XR(b)
        • R(b);N_PINB(E),XS(B)::S(G)
        • P(e);OGATEB::QAB(H)
        • S(a);N_GUARD::S(B)
        • S(a);N_GUARD::S(B),XS(a)
      • Refutation
        • R(b);N_PINB(E),XS(G)
  • Actual
    • Q(H);
    • Vars
      • R(b);CHECK,N_GUARD,XB(E)::QAB(H)+S(G)
      • R(b);N_PINB(E),XS(B)::QAB(H)+S(G),DCHECK
      • R(b);N_PINB(E),OGATE,P_SPINR(b),XS(G)::QAB1(H),XR(b)
      • P(e);OGATEB::QAB(H)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
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