MESON Chess Problem Database

Problem Display
PID: 266682 (6b1/3R4/1bp1N2n/2pP4/4kPQN/7p/K2BB1rn/3R4 w - - 0 1)

Shire, David J

The Problemist, 1997

6b1/3R4/1bp1N2n/2pP4/4kPQN/7p/K2BB1rn/3R4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Qxe2#
    • 1...Sf1
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sf7
      • 2.Qf5#
  • Tries
    • 1.Bf3+?
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Kd3!
    • 1.Qxg2+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...hxg2!
    • 1.Qg6+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Rxg6!
    • 1.dxc6?
      • threat
        • 2.Bd3#
      • 1...Bxe6+
        • 2.Qxe6#
      • 1...Rxe2
        • 2.Qxe2#
      • 1...c4
        • 2.Sg5#
      • 1...Rg3!
  • Keys
    • 1.Bc1!
      • threat
        • 2.Sg5#
      • 1...Rxe2+
        • 2.Qxe2#
      • 1...Rxg4
        • 2.Bd3#
      • 1...Bxe6
        • 2.Qxe6#
      • 1...Bd8
        • 2.Sxc5#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sf7
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(a);OGATE,P_PINB(C),XB(D)::QAR2(F),XR(a)
    • S(b);N_GUARD::QAB1(F)
    • S(b);N_GUARD::QAB1(F),XS(b)
    • S(h);N_GUARD::QAB1(F),XS(h)
    • S(h);N_GUARD::QAB1(F)
  • Tries
    • Try
      • B(D);CHECK,P_SPINB(C)
      • Vars
        • S(b);OGATE,XB(D)::QAB1(F),XS(b)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(F);CHECK,XR(a)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(F),XS(b)
      • Refutation
        • P(c);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAB1(F),XS(h)
      • Refutation
        • R(a);XQ(F)
    • Try
      • P(H);P_SPINS(I),XP(g)
      • Threat
        • B(D)
      • Vars
        • B(i);CHECK,OGATE,XS(I)::QAR2(F),XB(i)
        • R(a);OGATE,P_PINB(C),XB(D)::QAR2(F),XR(a)
        • P(e);N_PINS(I)::S(I)
      • Refutation
        • R(a);
  • Actual
    • B(C);P_SPINB(D)
    • Threat
      • S(I)
    • Vars
      • R(a);CHECK,OGATE,XB(D)::QAR2(F),XR(a)
      • R(a);N_PINB(D),XQ(F)::B(D)
      • B(i);OGATE,P_PINP(H),XS(I)::QAR2(F),XB(i)
      • B(f);N_GUARD::S(I),XP(e)
      • S(b);N_GUARD::QAB1(F),XS(b)
      • S(h);N_GUARD::QAB1(F)
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