MESON Chess Problem Database

Problem Display
PID: 205100 (n7/3p4/5Q2/p1k5/b3RN2/1p6/1p1P4/1K3B2 w - - 0 1)

Janet, Frank

American Chess Bulletin, 1913

n7/3p4/5Q2/p1k5/b3RN2/1p6/1p1P4/1K3B2

#2

6 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6
      • 2.Qd4#
  • Tries
    • 1.Sd3+?
      • 1...Kd5
        • 2.Rd4#
      • 1...Kb5!
    • 1.Re5+?
      • 1...Kb4
        • 2.Qd6#
      • 1...Kd4
        • 2.Qd6#
      • 1...d5!
  • Keys
    • 1.Rb4!
      • 1...Kxb4
        • 2.Qd6#
      • 1...axb4
        • 2.d4#
      • 1...d6
        • 2.Qc3#
      • 1...Bb5
        • 2.Rxb5#
      • 1...Bc6
        • 2.Qd4#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Sc7
        • 2.Qb6#
      • 1...d5
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(c);SBLOCK::QAB1(F)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(e);P-FLIGHT::R1(D)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB(F)
        • K(e);S_FLIGHT::QAR2(F)
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • R(D);
    • Vars
      • K(e);S_FLIGHT,XR(D)::QAB(F)
      • P(d);SBLOCK,XR(D)::P(C)
      • P(f);SBLOCK::QAR2(F)
      • B(c);N_GUARD::R1(D),XB(c)
      • B(c);SBLOCK::QAB1(F)
      • S(g);N_GUARD::QAB1(F),XS(g)
      • S(g);N_GUARD::QAB1(F)
      • P(f);SBLOCK::S(E)
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