MESON Chess Problem Database

Problem Display
PID: 148493 (8/3Qp3/1K1Np2n/3pk2N/1R2BpP1/8/4n3/3r4 w - - 0 1)

Foster, Geoffrey R

Shanahan, Ian

The Problemist, 2012

8/3Qp3/1K1Np2n/3pk2N/1R2BpP1/8/4n3/3r4

#2

7 + 8

56 The Problemist 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sxg4
      • 2.Sf7#
    • 1...Sf5
      • 2.Sf7#
    • 1...Sf7
      • 2.Sxf7#
    • 1...Sg8
      • 2.Sf7#
    • 1...dxe4
      • 2.Sc4#
    • 1...d4
      • 2.Rb5#
    • 1...exd6
      • 2.Qg7#
  • Tries
    • 1.Bf5?
      • threat
        • 2.Qxe6#
      • 1...Sxf5
        • 2.Sf7#
      • 1...exf5
        • 2.Qxe7#
      • 1...Sd4!
  • Keys
    • 1.Bxd5!
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Sf7#
      • 1...Rxd5
        • 2.Re4#
      • 1...exd5
        • 2.Qxe7#
      • 1...Sd4
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • S(g);N_GUARD,XP(C)::S(F)
    • S(g);N_GUARD::S(F)
    • S(g);N_GUARD::S(F),XS(g)
    • P(d);N_GUARD,SBLOCK,XB(B)::S(F)
    • P(d);OGATEB,SBLOCK::R(A)
    • P(h);OGATE,SBLOCK,XS(F)::QAB(G)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(G),XP(f)
      • Vars
        • S(g);N_GUARD,XB(B)::S(F)
        • P(f);OGATEB,XB(B)::QAR2(G),XP(h)
      • Refutation
        • S(b);
  • Actual
    • B(B);XP(d)
    • Threat
      • QAR1(G),XP(f)
    • Vars
      • K(e);P-FLIGHT,XB(B)::QAR(G)+S(F)
      • R(a);SBLOCK,XB(B)::R1(A)
      • P(f);OGATEB,SBLOCK,XB(B)::QAR2(G),XP(h)
      • S(b);SBLOCK::S(F)
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