MESON Chess Problem Database

Problem Display
PID: 249308 (8/1B3R2/2pppnK1/3pk3/4pNRb/2P2P2/1Q6/8 w - - 0 1)

Foster, Geoffrey R

The Problemist, 1990

8/1B3R2/2pppnK1/3pk3/4pNRb/2P2P2/1Q6/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...exf3
      • 2.Sd3#
    • 1...e3
      • 2.Sd3#
    • 1...d4
      • 2.cxd4#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qd4#
      • 1...Bf2
        • 2.Rg5#
      • 1...d4
        • 2.Qxd4#
        • 2.cxd4#
      • 1...c5!
    • 1.fxe4?
      • threat
        • 2.Sd3#
      • 1...Kxe4
        • 2.Qe2#
      • 1...dxe4
        • 2.c4#
      • 1...Sxg4!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.c4#
      • 1...Kxd5
        • 2.Qb5#
      • 1...Sxd5
        • 2.Rxe4#
      • 1...cxd5
        • 2.f4#
      • 1...exd5
        • 2.Re7#
      • 1...Be1
        • 2.Rg5#
      • 1...Bf2
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • P(a);N_GUARD,XP(C)::S(D)
    • P(a);N_GUARD::S(D)
    • P(c);OGATE::P(B),XP(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(b);N_GUARD::R(E)
      • Refutation
        • P(e);
    • Try
      • P(C);XP(a)
      • Threat
        • S(D)
      • Vars
        • K(d);OGATEB,P-FLIGHT,XP(C)::QAR2(A)
        • P(c);N_GUARD,SBLOCK,XP(C)::QAB(A)+P(B)
      • Refutation
        • S(h);XR(E)
  • Actual
    • S(D);XP(c)
    • Threat
      • QAB(A)+P(B)
    • Vars
      • K(d);OGATEB,P-FLIGHT,P_SPINP(e),XS(D)::QAR2(A)
      • S(h);N_GUARD,SBLOCK,XS(D)::R1(E),XP(a)
      • P(e);XS(D)::P(C)
      • P(g);OGATEB,SBLOCK,XS(D)::R(H)
      • B(b);N_GUARD::R(E)
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