MESON Chess Problem Database

Problem Display
PID: 33566 (2N4Q/8/2p3P1/2rkNB1p/1qp5/2P2P1K/7b/4r3 w - - 0 1)

Shire, David J

Die Schwalbe, 1994

2N4Q/8/2p3P1/2rkNB1p/1qp5/2P2P1K/7b/4r3

#2

8 + 8

3256 David Shire Selected Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.fxe4#
    • 1...Rxe5
      • 2.Qd8#
    • 1...Bxe5
      • 2.Qg8#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Qd4#
      • 1...Qxc3
        • 2.Sdb6#
      • 1...Rd1
        • 2.Qg8#
      • 1...Re4
        • 2.fxe4#
      • 1...Re5
        • 2.Sf6#
      • 1...Be5
        • 2.Qg8#
      • 1...Bg1!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Qd4#
      • 1...Qxc3
        • 2.Sb6#
      • 1...Rd1
        • 2.Se7#
      • 1...Re4
        • 2.fxe4#
      • 1...Re5
        • 2.Qd8#
      • 1...Bg1
        • 2.Qd8#
      • 1...Be5
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE::P(B),XR(a)
    • R(a);SBLOCK,XS(D)::QAR(H)
    • B(b);SBLOCK,XS(D)::QAB(H)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(H)
      • Vars
        • Q(c);N_GUARD,P_PINP(B),XP(A)::S(D)
        • R(a);N_GUARD::QAB(H)
        • R(a);OGATE::P(B),XR(a)
        • R(a);SBLOCK::S(D)
        • B(b);S_CUTR(a)::QAB(H)
      • Refutation
        • B(b);
  • Actual
    • S(D);
    • Threat
      • QAR1(H)
    • Vars
      • Q(c);N_GUARD,P_PINP(B),XP(A)::S(G)
      • R(a);N_GUARD::S(G)
      • R(a);OGATE::P(B),XR(a)
      • R(a);S_CUTB(b)::QAR(H)
      • B(b);N_GUARD::QAR(H)
      • B(b);S_CUTR(a)::S(G)
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