MESON Chess Problem Database

Problem Display
PID: 30305 (b7/2pN4/6R1/KP1kp3/2ppp1B1/2pnb3/3NQ3/8 w - - 0 1)

Shire, David J

1st Prize, Het Belgisch Schaakbord (L'Echiquier Belge), 1989-1990

b7/2pN4/6R1/KP1kp3/2ppp1B1/2pnb3/3NQ3/8

#2

7 + 10

3256 David Shire Selected Chess Problems 2001
5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qxe4#
    • 1...Bf2
      • 2.Qxe4#
    • 1...Bf4
      • 2.Qxe4#
    • 1...Bg5
      • 2.Qxe4#
    • 1...Bh6
      • 2.Qxe4#
    • 1...Sc1
      • 2.Qxc4#
    • 1...Se1
      • 2.Qxc4#
    • 1...Sf2
      • 2.Qxc4#
    • 1...Sb4
      • 2.Qxc4#
    • 1...Sf4
      • 2.Qxc4#
    • 1...Sc5
      • 2.Qxc4#
    • 1...c5
      • 2.Sb6#
  • Tries
    • 1.Sxc4?
      • threat
        • 2.Be6#
      • 1...Kxc4
        • 2.Qa2#
      • 1...Sc5
        • 2.Sf6#
      • 1...Sf4!
    • 1.Bf5?
      • threat
        • 2.Bxe4#
      • 1...Sf2
        • 2.Qxc4#
      • 1...Sc5
        • 2.Qxc4#
      • 1...cxd2!
    • 1.Rc6?
      • threat
        • 2.Sf6#
        • 2.Be6#
      • 1...Bg5
        • 2.Be6#
        • 2.Qxe4#
      • 1...Sf4
        • 2.Sf6#
        • 2.Qxc4#
      • 1...Sc5
        • 2.Sf6#
        • 2.Qxc4#
      • 1...Bxc6!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Sdf6#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Bg5
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • B(c);OGATE::QAB1(B),XP(f)
    • S(b);OGATE::QAB1(B),XP(d)
    • P(i);N_GUARD,SBLOCK::S(G)
  • Tries
    • Try
      • S(A);XP(d)
      • Threat
        • B(C)
      • Vars
        • K(g);OGATEB,P_SPINS(b),S_FLIGHT,XS(A)::QAB(B)
        • S(b);SBLOCK::S(G)
      • Refutation
        • S(b);
    • Try
      • B(C);
      • Threat
        • B(C),XP(f)
      • Vars
        • S(b);OGATE::QAB1(B),XP(d)
      • Refutation
        • P(a);XS(A)
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Refutation
        • B(j);XR(F)
  • Actual
    • S(A);XP(f)
    • Threat
      • S(G)
    • Vars
      • K(g);OGATEB,P_SPINB(c),S_FLIGHT,XS(A)::QAB1(B)
      • B(c);::B(C)
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