MESON Chess Problem Database

Problem Display
PID: 966 (5rBB/3pR2Q/3pqnn1/1R1bkN1P/3N2pr/3PP1PP/4K3/8 w - - 0 1)

Saunders, Denis M

The Problemist Supplement, 1994

5rBB/3pR2Q/3pqnn1/1R1bkN1P/3N2pr/3PP1PP/4K3/8

#2

13 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe7
      • 2.Rxd5#
    • 1...Sf4+
      • 2.exf4#
      • 2.gxf4#
  • Tries
    • 1.Sf3+?
      • 1...Kxf5
        • 2.Qxg6#
      • 1...gxf3+!
    • 1.Sc6+?
      • 1...Kxf5
        • 2.Qxg6#
      • 1...dxc6!
    • 1.Sxh4?
      • threat
        • 2.Sxg6#
      • 1...Sf4+
        • 2.gxf4#
      • 1...Sxh4
        • 2.Qe4#
      • 1...Sxe7
        • 2.Qe4#
      • 1...Sxh8
        • 2.Qf5#
      • 1...Rxg8!
  • Keys
    • 1.Sh6!
      • 1...Sf4+
        • 2.gxf4#
      • 1...Qxe7
        • 2.Rxd5#
      • 1...Rxh3
        • 2.Sxg4#
      • 1...Rxh5
        • 2.Sxg4#
      • 1...Rxg8
        • 2.Sf7#
      • 1...Sxe7
        • 2.Qe4#
      • 1...Sxh8
        • 2.Qf5#
      • 1...gxh3
        • 2.Sf3#
      • 1...Rf7
        • 2.Sxf7#
      • 1...Ra8
        • 2.Sf7#
      • 1...Rb8
        • 2.Sf7#
      • 1...Rc8
        • 2.Sf7#
      • 1...Rd8
        • 2.Sf7#
      • 1...Re8
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • Q(f);N_SPINQ(f),XR(J)::R1(G),XB(c)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(d);N_SPINQ(f),N_SPINS(g),P-FLIGHT,P_PINP(C),P_SPINS(h),XS(H)::QAB1(K),XS(h)
      • Refutation
        • P(a);CHECK,XS(F)
    • Try
      • S(F);CHECK
      • Vars
        • K(d);N_SPINQ(f),N_SPINS(g),P-FLIGHT,P_PINP(C),P_SPINS(h),XS(H)::QAB1(K),XS(h)
      • Refutation
        • P(i);XS(F)
    • Try
      • S(H);XR(b)
      • Threat
        • S(H),XS(h)
      • Vars
        • S(h);CHECK,OGATE::P(D),XS(h)
        • S(h);OGATE,XS(H)::QAR1(K)
        • S(h);N_SPINQ(f),OGATE,XR(J)::QAR1(K)
        • S(h);N_SPINS(g),OGATE,XB(M)::QAR1(K)
      • Refutation
        • R(j);XB(L)
  • Actual
    • S(H);
    • Vars
      • S(h);CHECK,OGATE::P(D),XS(h)
      • Q(f);N_SPINQ(f),XR(J)::R1(G),XB(c)
      • R(b);N_GUARD,XP(E)::S(H),XP(a)
      • R(b);N_GUARD,XP(I)::S(H),XP(a)
      • R(j);N_GUARD,XB(L)::S(H)
      • S(h);N_SPINQ(f),OGATE,XR(J)::QAR1(K)
      • S(h);N_SPINS(g),OGATE,XB(M)::QAR1(K)
      • P(a);N_GUARD,XP(E)::S(F)
      • R(j);N_GUARD::S(H),XR(j)
      • R(j);N_GUARD::S(H)
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