MESON Chess Problem Database

Problem Display
PID: 259195 (8/8/nNp1r2p/P3B2Q/Rn2kppK/R3p2p/p3B2P/8 w - - 0 1)

Alexander, Frederick Forrest Lawrie

Western Morning News, 1923

(First published on Sat Aug 18 1923)

8/8/nNp1r2p/P3B2Q/Rn2kppK/R3p2p/p3B2P/8

#2

9 + 11

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Rxb4#
    • 1...Sc7
      • 2.Rxb4#
    • 1...Sb8
      • 2.Rxb4#
    • 1...f3
      • 2.Bd3#
    • 1...g3
      • 2.Bd3#
      • 2.Bf3#
  • Tries
    • 1.Bxg4?
      • threat
        • 2.Bf3#
        • 2.Qf5#
      • 1...Rf6
        • 2.Bf3#
      • 1...f3
        • 2.Bxf3#
        • 2.Qf5#
      • 1...Rxe5!
    • 1.Bf6?
      • threat
        • 2.Qg6#
      • 1...Re5
        • 2.Qxe5#
      • 1...f3
        • 2.Qxg4#
      • 1...Rxf6!
  • Keys
    • 1.Ba1!
      • 1...f3
        • 2.Qxg4#
      • 1...Re5
        • 2.Qxe5#
      • 1...Rd6
        • 2.Qe5#
      • 1...Rf6
        • 2.Qe5#
      • 1...Rg6
        • 2.Qxg6#
        • 2.Qe5#
      • 1...Re7
        • 2.Qg6#
      • 1...Re8
        • 2.Qg6#
      • 1...Sc5
        • 2.Rxb4#
      • 1...Sc7
        • 2.Rxb4#
      • 1...Sb8
        • 2.Rxb4#
      • 1...g3
        • 2.Bd3#
        • 2.Bf3#
      • 1...c5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(h);N_GUARD::R(D),XS(d)
    • P(f);SBLOCK::B(A)
  • Tries
    • Try
      • B(A);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(j);::B(A)
      • Refutation
        • R(j);XB(G)
    • Try
      • B(G);
      • Threat
        • QAB(H)
      • Vars
        • R(j);N_GUARD::QAR1(H),XR(j)
        • P(f);OGATEB::QAR2(H),XP(g)
      • Refutation
        • R(j);XB(G)
  • Actual
    • B(G);
    • Vars
      • P(f);OGATEB::QAR2(H),XP(g)
      • R(j);N_GUARD::QAR1(H),XR(j)
      • R(j);N_GUARD::QAR1(H)
      • R(j);N_GUARD::QAB(H)
      • S(h);N_GUARD::R(D),XS(d)
      • P(i);N_GUARD::QAB1(H)
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