MESON Chess Problem Database

Problem Display
PID: 142311 (8/8/N3P3/n2pP1p1/3k1N2/6BP/1RK1Q1pr/6bB w - - 0 1)

Pirnie, Duncan

Derby Advertiser, 1905

8/8/N3P3/n2pP1p1/3k1N2/6BP/1RK1Q1pr/6bB

#2

10 + 7

119 Tidskrift for Schack 1909
14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Bxf2#
    • 1...Sb7
      • 2.Rb4#
  • Tries
    • 1.Sxg2?
      • threat
        • 2.Qd3#
        • 2.Qg4#
      • 1...Be3
        • 2.Qd3#
      • 1...g4
        • 2.Qd3#
        • 2.Qxg4#
      • 1...Rxg2!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Sxg2#
      • 1...gxh1Q+
        • 2.Sg2#
      • 1...gxh1S+
        • 2.Sg2#
      • 1...gxh1B+
        • 2.Sg2#
      • 1...gxh1R+
        • 2.Sg2#
      • 1...Ke3
        • 2.Sxd5#
      • 1...Kc4
        • 2.Rb4#
      • 1...Ke4
        • 2.Sxg2#
      • 1...Kxe5
        • 2.Sh5#
      • 1...gxf4
        • 2.Qxf4#
      • 1...Be3
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::B(E),XB(a)
    • S(e);N_GUARD::R(B)
  • Tries
    • Try
      • S(G);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR1(D)
      • Refutation
        • R(c);P_PINQ(D),XS(G)
  • Actual
    • Q(D);
    • Threat
      • QAR(D)+S(G),XP(b)
    • Vars
      • P(b);CHECK,XB(A)::QAR(D)+S(G)
      • K(d);S_FLIGHT::S(G),XP(f)
      • K(d);P-FLIGHT::R1(B)
      • K(d);P-FLIGHT,P_SPINP(b)::QAR(D)+S(G),XP(b)
      • K(d);S_FLIGHT,XP(H)::B(E)+S(G)
      • P(g);OGATE,P_SPINP(g),XS(G)::QAR2(D),XP(g)
      • B(a);SBLOCK::QAR(D)+S(G),DCHECK
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