MESON Chess Problem Database

Problem Display
PID: 54568 (2Q4B/1pp1p3/n2RN1pp/4K3/B1P4R/2kN1PP1/3p4/3n4 w - - 0 1)

Barnes, Barry Peter

Conquering Kings, 2004

2Q4B/1pp1p3/n2RN1pp/4K3/B1P4R/2kN1PP1/3p4/3n4

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Kf5#
    • 1...cxd6+
      • 2.Ke4#
  • Tries
    • 1.Sec5?
      • threat
        • 2.Ke6#
      • 1...e6
        • 2.Kxe6#
      • 1...Sxc5!
    • 1.Qxc7?
      • threat
        • 2.Ke4#
        • 2.Kf4#
      • 1...exd6+
        • 2.Ke4#
      • 1...Sf2
        • 2.Kf4#
      • 1...Sc5
        • 2.Qa5#
      • 1...g5
        • 2.Ke4#
        • 2.Kf5#
      • 1...Sxc7!
  • Keys
    • 1.Sef4!
      • threat
        • 2.Se2#
      • 1...cxd6+
        • 2.Ke6#
      • 1...exd6+
        • 2.Kd5#
      • 1...Kxc4
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(e);::B(K)+K(G)
    • P(h);CHECK,XR(H)::B(K)+K(G)
  • Tries
    • Try
      • S(I);
      • Threat
        • B(K)+K(G)
      • Vars
        • P(i);::B(K)+K(G),XP(i)
      • Refutation
        • S(d);XS(I)
    • Try
      • Q(J);XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • P(i);CHECK,XR(H)::B(K)+K(G)
        • S(a);::B(K)+K(G)
        • S(d);N_GUARD::QAB(J)
      • Refutation
        • S(d);XQ(J)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • P(h);CHECK,XR(H)::B(K)+K(G)
      • P(i);CHECK,N_GUARD,XR(H)::B(K)+K(G)
      • K(c);P-FLIGHT,P_SPINP(h),XP(E)::R(F)+S(I)
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