MESON Chess Problem Database

Problem Display
PID: 198367 (1b6/Qp3N2/2ppR2K/1bn5/nN1k1P2/1P5R/8/8 w - - 0 1)

Beechey, H

Brisbane Courier, 1920

1b6/Qp3N2/2ppR2K/1bn5/nN1k1P2/1P5R/8/8

#2

8 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Rxd3#
    • 1...Sb6
      • 2.Qa1#
    • 1...d5
      • 2.Sc2#
  • Tries
    • 1.Sxd6?
      • threat
        • 2.Sf5#
        • 2.Re4#
      • 1...Bxa7
        • 2.Sf5#
      • 1...Bd3
        • 2.Rxd3#
      • 1...Sc3
        • 2.Sf5#
      • 1...Sb6
        • 2.Sf5#
        • 2.Qa1#
      • 1...b6
        • 2.Sf5#
        • 2.Qg7#
      • 1...Bxd6!
    • 1.Re5?
      • threat
        • 2.Sc2#
      • 1...Bd3
        • 2.Rxd3#
      • 1...dxe5!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Re4#
      • 1...Bxa7
        • 2.Rxd6#
      • 1...Bd3
        • 2.Rxd3#
      • 1...Sc3
        • 2.Sf3#
      • 1...Sb6
        • 2.Qa1#
      • 1...d5
        • 2.Sc2#
      • 1...b6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD::R1(B),XB(c)
    • S(a);N_SPINS(d),OGATE::QAB(G)
    • P(f);SBLOCK::S(C)
  • Tries
    • Try
      • S(H);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(h);N_SPINS(d),XQ(G)::S(H)
        • B(c);N_GUARD::R1(B),XB(c)
        • S(a);::S(H)
      • Refutation
        • B(h);XS(H)
    • Try
      • R(E);
      • Threat
        • S(C)
      • Vars
        • B(c);N_GUARD::R1(B),XB(c)
      • Refutation
        • P(f);XR(E)
  • Actual
    • S(H);
    • Threat
      • R1(E)
    • Vars
      • B(h);N_GUARD,N_SPINS(d),XQ(G)::R(E),XP(f)
      • B(c);N_GUARD::R1(B),XB(c)
      • S(a);SBLOCK::S(H)
      • S(a);N_SPINS(d),OGATE::QAB(G)
      • P(f);SBLOCK::S(C)
      • P(g);N_SPINS(d),OGATE::QAB(G)
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