MESON Chess Problem Database

Problem Display
PID: 196961 (2b5/1p1p4/3n4/4p1B1/pPBkP1K1/r2pN1NR/1P1n4/3R4 w - - 0 1)

Janet, Frank

British Chess Magazine, 1919

2b5/1p1p4/3n4/4p1B1/pPBkP1K1/r2pN1NR/1P1n4/3R4

#2

10 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Rxd3#
    • 1...S2xc4
      • 2.Sc2#
    • 1...S2xe4
      • 2.Se2#
    • 1...S6xc4
      • 2.Sef5#
    • 1...S6xe4
      • 2.Sgf5#
  • Tries
    • 1.Se2+?
      • 1...Kxe4
        • 2.Bd5#
      • 1...dxe2!
    • 1.Sgf5+?
      • 1...Kxe4
        • 2.Bd5#
      • 1...Sxf5!
  • Keys
    • 1.Bd8!
      • threat
        • 2.Bb6#
      • 1...Kxe3
        • 2.Bb6#
      • 1...S2xc4
        • 2.Sc2#
      • 1...S2xe4
        • 2.Se2#
      • 1...S6xc4
        • 2.Sef5#
      • 1...S6xe4
        • 2.Sgf5#
      • 1...Sb3
        • 2.Rxd3#
      • 1...b6
        • 2.Bxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE,P_SPINP(c)::R1(A),XP(c)
    • S(a);P_SPINP(c),SBLOCK,XB(G)::S(C)
    • S(a);P_SPINP(c),SBLOCK,XP(H)::S(D)
    • S(g);N_GUARD,SBLOCK,XB(G)::S(C)
    • S(g);N_GUARD,SBLOCK,XP(H)::S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(H)::B(G)
      • Refutation
        • P(c);P_SPINS(a),XS(D)
    • Try
      • S(D);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(H)::B(G)
      • Refutation
        • S(g);XS(D)
  • Actual
    • B(J);
    • Threat
      • B(J)
    • Vars
      • K(e);S_FLIGHT,XS(C)::B(J)
      • S(a);P_SPINP(c),SBLOCK,XB(G)::S(C)
      • S(a);P_SPINP(c),SBLOCK,XP(H)::S(D)
      • S(g);N_GUARD,SBLOCK,XB(G)::S(C)
      • S(g);N_GUARD,SBLOCK,XP(H)::S(D)
      • S(a);OGATE,P_SPINP(c)::R1(A),XP(c)
      • P(h);::B(J),XP(h)
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