MESON Chess Problem Database

Problem Display
PID: 47375 (4KB2/2p5/1pNp3R/2rk1B2/P2P2pn/1P6/3bP3/2Q5 w - - 0 1)

Howard, David M

Problem Observer, 2003

4KB2/2p5/1pNp3R/2rk1B2/P2P2pn/1P6/3bP3/2Q5

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Be4#
    • 1...Rc4
      • 2.Qxc4#
    • 1...Ra5
      • 2.Qc4#
      • 2.e4#
    • 1...Rb5
      • 2.Qc4#
      • 2.e4#
    • 1...Sxf5
      • 2.Qh1#
    • 1...Sg6
      • 2.Qh1#
  • Tries
    • 1.Qh1+?
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sf3!
    • 1.Qc4+?
      • 1...Kxc6
        • 2.Be4#
      • 1...Rxc4!
    • 1.Qxc5+?
      • 1...dxc5
        • 2.e4#
      • 1...bxc5!
  • Keys
    • 1.Bg7!
      • threat
        • 2.Se7#
      • 1...Kxc6
        • 2.Be4#
      • 1...Rxc6
        • 2.e4#
      • 1...Sxf5
        • 2.Qh1#
      • 1...Bg5
        • 2.Sb4#
      • 1...Sg6
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);P_SPINP(g),P_SPINR(d),S_FLIGHT,XS(G)::B(F)
    • R(d);N_GUARD::QAB1(A),XR(d)
    • S(c);N_GUARD,XB(F)::QAB(A)
    • S(c);N_GUARD::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(A),XS(c)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);P_SPINP(g),P_SPINR(d),S_FLIGHT,XS(G)::B(F)
      • Refutation
        • R(d);XQ(A)
    • Try
      • Q(A);CHECK,XR(d)
      • Vars
        • P(g);XQ(A)::P(B)
      • Refutation
        • P(f);XQ(A)
  • Actual
    • B(J);
    • Threat
      • S(G)
    • Vars
      • K(e);P_SPINP(g),P_SPINR(d),S_FLIGHT,XS(G)::B(F)
      • R(d);XS(G)::P(B)
      • S(c);N_GUARD,XB(F)::QAB(A)
      • B(a);N_GUARD::S(G)
      • S(c);N_GUARD::QAB(A)
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