MESON Chess Problem Database

Problem Display
PID: 196879 (8/8/K2pp3/N3R3/1N1kP2R/n7/2pP1P1Q/4n3 w - - 0 1)

Greenwood, William M

British Chess Magazine, 1919

8/8/K2pp3/N3R3/1N1kP2R/n7/2pP1P1Q/4n3

#2

9 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Sbc6#
    • 1...Sc4
      • 2.Sb3#
      • 2.Sac6#
  • Tries
    • 1.Rb5?
      • threat
        • 2.Qxd6#
        • 2.e5#
      • 1...Sg2
        • 2.Qxd6#
      • 1...Sd3
        • 2.Sbc6#
        • 2.Qxd6#
      • 1...Sf3
        • 2.Qxd6#
      • 1...Sc4
        • 2.Sb3#
        • 2.Sac6#
        • 2.e5#
      • 1...d5
        • 2.exd5#
        • 2.e5#
      • 1...e5
        • 2.Rd5#
      • 1...Sxb5!
    • 1.Rc5?
      • threat
        • 2.Sb3#
        • 2.Qxd6#
      • 1...dxc5
        • 2.Qd6#
        • 2.e5#
      • 1...c1S
        • 2.Qxd6#
      • 1...Sc4
        • 2.Sb3#
        • 2.Rxc4#
      • 1...Sb5
        • 2.Sb3#
        • 2.Rc4#
      • 1...d5
        • 2.Sb3#
      • 1...e5
        • 2.Sb3#
        • 2.Rd5#
      • 1...Kxc5!
  • Keys
    • 1.Qg1!
      • threat
        • 2.f4#
      • 1...Kxe5
        • 2.Qg7#
      • 1...dxe5
        • 2.f3#
      • 1...Sg2
        • 2.Qa1#
      • 1...Sd3
        • 2.Sbc6#
      • 1...Sf3
        • 2.Qa1#
      • 1...Sc4
        • 2.Sac6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::S(D)
  • Tries
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR2(C),XP(e)
        • P(f);N_GUARD::R1(H)
      • Refutation
        • S(c);XR(H)
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR2(C),XP(e)
        • P(e);::S(G)
      • Refutation
        • K(d);S_FLIGHT,XR(H)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+P(B)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(H)::QAB(C)
      • P(e);SBLOCK,XR(H)::QAB(C)+P(B)
      • S(a);OGATE::QAB(C)
      • S(a);SBLOCK::S(D)
      • S(c);SBLOCK::S(G)
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