MESON Chess Problem Database

Problem Display
PID: 222514 (b5q1/2pN2b1/4pp2/K6n/4k3/1Q2B1P1/8/4nR2 w - - 0 1)

Pirnie, Duncan

British Chess Magazine, 1930

b5q1/2pN2b1/4pp2/K6n/4k3/1Q2B1P1/8/4nR2

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sxg3
      • 2.Rf4#
    • 1...Sf4
      • 2.Rxf4#
    • 1...e5
      • 2.Sc5#
  • Tries
    • 1.Bc5?
      • threat
        • 2.Qc4#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sf4
        • 2.Rxf4#
      • 1...Bd5
        • 2.Qe3#
      • 1...Sc2
        • 2.Qf3#
      • 1...f5
        • 2.Rxe1#
      • 1...e5!
  • Keys
    • 1.Bg1!
      • threat
        • 2.Qc4#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sf4
        • 2.Rxf4#
      • 1...Bd5
        • 2.Qe3#
      • 1...Sc2
        • 2.Qf3#
      • 1...e5
        • 2.Sc5#
      • 1...f5
        • 2.Rxe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD,XP(D)::R1(A)
    • S(c);N_GUARD::R1(A),XS(c)
    • P(d);SBLOCK::S(F)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR2(B)
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(c);N_GUARD::R1(A),XS(c)
        • B(h);SBLOCK::QAR1(B)
        • S(a);N_GUARD::QAB1(B)
        • P(e);SBLOCK::R(A),XS(a)
      • Refutation
        • P(d);
  • Actual
    • B(C);
    • Threat
      • QAR2(B)
    • Vars
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(c);N_GUARD::R1(A),XS(c)
      • B(h);SBLOCK::QAR1(B)
      • S(a);N_GUARD::QAB1(B)
      • P(d);SBLOCK::S(F)
      • P(e);SBLOCK::R(A),XS(a)
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