MESON Chess Problem Database

Problem Display
PID: 142995 (3N4/p2p4/Pn1p4/QB1kq3/pP1P1R1p/3RpP2/rb2N2K/8 w - - 0 1)

Francey, James

Source?, 0000

3N4/p2p4/Pn1p4/QB1kq3/pP1P1R1p/3RpP2/rb2N2K/8

#2

11 + 11

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Rf5#
    • 1...Qxf4+
      • 2.Sxf4#
    • 1...Qe4
      • 2.fxe4#
    • 1...Qf5
      • 2.Rxf5#
    • 1...Sc4
      • 2.Bc6#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Bd3#
      • 1...Qxf4+
        • 2.Sxf4#
      • 1...Qxd4
        • 2.Rf5#
      • 1...Sc4
        • 2.Bc6#
      • 1...Bxd4!
    • 1.Rc3?
      • threat
        • 2.Bd3#
        • 2.Bxa4#
        • 2.Bc4#
        • 2.Bc6#
        • 2.Bxd7#
      • 1...Qxd4
        • 2.Bc4#
        • 2.Bc6#
      • 1...Bxc3
        • 2.Bd3#
      • 1...Sc4
        • 2.Bxc4#
        • 2.Bc6#
      • 1...a3
        • 2.Bd3#
        • 2.Ba4#
        • 2.Bc4#
        • 2.Bc6#
        • 2.Bxd7#
      • 1...Qxf4+!
    • 1.Qxb6?
      • threat
        • 2.Qb7#
      • 1...Qxf4+
        • 2.Sxf4#
      • 1...Qxd4
        • 2.Rf5#
      • 1...axb6!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Bd3#
      • 1...Qxf4+
        • 2.Sxf4#
      • 1...Qxd4
        • 2.Rf5#
      • 1...Bxd4
        • 2.Sc3#
      • 1...Sc4
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(g);N_PINR(G),P_SPINQ(g),XP(F)::R(G)
    • Q(g);CHECK,XR(G)::S(A),XQ(g)
    • Q(g);N_PINR(G),OGATE::P(D),XQ(g)
    • Q(g);N_PINR(G)::R(G),XQ(g)
    • S(h);SBLOCK::QAR(H)+B(I),DCHECK
  • Tries
    • Try
      • R(C);
      • Threat
        • QAR(H)+B(I)
      • Vars
        • Q(g);CHECK,XR(G)::S(A),XQ(g)
        • Q(g);N_PINR(G),P_SPINQ(g),XP(F)::R(G)
        • S(h);SBLOCK::QAR(H)+B(I),DCHECK
      • Refutation
        • B(b);P_PINS(A),P_SPINB(b),XP(F)
    • Try
      • R(C);
      • Threat
        • DUALS(5)
      • Vars
        • B(b);P_PINS(A),XR(C)::QAR(H)+B(I)
      • Refutation
        • Q(g);CHECK,XR(G)
    • Try
      • Q(H);XS(h)
      • Threat
        • QAB(H)
      • Vars
        • Q(g);CHECK,XR(G)::S(A),XQ(g)
        • Q(g);N_PINR(G),P_SPINQ(g),XP(F)::R(G)
      • Refutation
        • P(j);XQ(H)
  • Actual
    • R(C);
    • Threat
      • QAR(H)+B(I)
    • Vars
      • Q(g);CHECK,XR(G)::S(A),XQ(g)
      • Q(g);N_PINR(G),P_SPINQ(g),XP(F)::R(G)
      • B(b);N_GUARD,P_SPINB(b),XP(F)::S(A)
      • S(h);SBLOCK::QAR(H)+B(I),DCHECK
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