MESON Chess Problem Database

Problem Display
PID: 144488 (2Q1Bb1n/2Pr2p1/1R1Nk3/2P2N2/b3PP2/1p6/1B6/3K4 w - - 0 1)

Francey, James

Grantham Journal, 1932

(First published on Sat Sep 10 1932)

2Q1Bb1n/2Pr2p1/1R1Nk3/2P2N2/b3PP2/1p6/1B6/3K4

#2

11 + 7

14867 BCPS Library 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd6
      • 2.Rxd6#
    • 1...Be7
      • 2.Sxg7#
    • 1...Sg6
      • 2.Bf7#
    • 1...Sf7
      • 2.Bxf7#
  • Tries
    • 1.Sd4+?
      • 1...Ke7
        • 2.S6f5#
      • 1...Kf6!
    • 1.Rb5?
      • threat
        • 2.Bxd7#
        • 2.Qxd7#
      • 1...Bxd6
        • 2.Qxd7#
      • 1...Bxb5!
    • 1.Rc6?
      • threat
        • 2.Bxd7#
        • 2.Qxd7#
      • 1...Bxd6
        • 2.Rxd6#
        • 2.Qxd7#
      • 1...Bxc6!
    • 1.c6?
      • threat
        • 2.Bxd7#
        • 2.Qxd7#
      • 1...Bxd6
        • 2.Qxd7#
      • 1...Bxc6!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Sd4#
      • 1...Rxd8
        • 2.cxd8S#
      • 1...Re7
        • 2.Sb5#
      • 1...Be7
        • 2.Sxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(f);OGATE,P_SPINB(f),XS(H)::R1(G),XB(f)
    • B(f);N_GUARD,SBLOCK::S(F),XP(e)
    • S(g);N_GUARD::B(K)
    • S(g);N_GUARD::B(K),XS(g)
  • Tries
    • Try
      • S(F);CHECK,N_SPINS(H)
      • Vars
        • K(c);N_SPINR(d),P-FLIGHT::S(H)
      • Refutation
        • K(c);N_SPINR(d),P-FLIGHT
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);XS(H)::QAB1(J),XR(d)
      • Refutation
        • B(b);XR(G)
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Refutation
        • B(b);XR(G)
    • Try
      • P(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);XS(H)::QAB1(J),XR(d)
      • Refutation
        • B(b);XP(E)
  • Actual
    • Q(J);N_PINR(d)
    • Threat
      • S(F)
    • Vars
      • R(d);OGATE,XQ(J)::PXR(d)=S
      • R(d);N_PINS(H)::R(G)+S(H)
      • B(f);N_GUARD,S_CUTR(d)::S(F),XP(e)
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