MESON Chess Problem Database

Problem Display
PID: 205102 (R6n/2ppk3/2P1B2R/4N3/4K1p1/6Q1/8/8 w - - 0 1)

Janet, Frank

American Chess Bulletin, 1915

R6n/2ppk3/2P1B2R/4N3/4K1p1/6Q1/8/8

#2

7 + 5

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qa3#
    • 1...dxc6
      • 2.Sxc6#
    • 1...dxe6
      • 2.Qa3#
    • 1...d6
      • 2.Qh4#
  • Tries
    • 1.Bxd7?
      • threat
        • 2.Re6#
        • 2.Re8#
        • 2.Qh4#
        • 2.Qa3#
      • 1...Sf7
        • 2.Re6#
        • 2.Re8#
      • 1...Sg6!
    • 1.Re8+?
      • 1...Kd6
        • 2.Qa3#
      • 1...Kxe8!
    • 1.Raxh8?
      • 1...Kd6
        • 2.Qa3#
      • 1...dxc6
        • 2.Sxc6#
      • 1...dxe6
        • 2.Qa3#
      • 1...d6
        • 2.Qh4#
      • 1...d5+!
  • Keys
    • 1.Kf5!
      • 1...dxe6+
        • 2.Rxe6#
      • 1...Kd6
        • 2.Qa3#
      • 1...dxc6
        • 2.Sxc6#
      • 1...Sf7
        • 2.Sg6#
      • 1...Sg6
        • 2.Sxg6#
      • 1...d5
        • 2.Qa3#
      • 1...d6
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT::QAB(A)
    • P(c);XP(D)::S(C),XP(c)
    • P(c);N_GUARD,XB(E)::QAB(A)
    • P(c);SBLOCK::QAB(A)
  • Tries
    • Try
      • B(E);XP(c)
      • Threat
        • DUALS(4)
      • Refutation
        • S(e);
    • Try
      • R(G);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB(A)
      • Refutation
        • K(d);P-FLIGHT,XR(G)
    • Try
      • R(G);XS(e)
      • Vars
        • K(d);S_FLIGHT::QAB(A)
        • P(c);XP(D)::S(C),XP(c)
        • P(c);N_GUARD,XB(E)::QAB(A)
        • P(c);SBLOCK::QAB(A)
      • Refutation
        • P(c);CHECK
  • Actual
    • K(B);S_FLIGHT
    • Vars
      • P(c);CHECK,OGATE,XB(E)::R1(F),XP(c)
      • K(d);S_FLIGHT::QAB(A)
      • P(c);XP(D)::S(C),XP(c)
      • S(e);N_GUARD::S(C)
      • S(e);N_GUARD::S(C),XS(e)
      • P(c);N_GUARD::QAB(A)
      • P(c);SBLOCK::QAB(A)
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