MESON Chess Problem Database

Problem Display
PID: 227407 (1K6/5N2/1pppn3/2Nk2p1/P3R3/1rp5/1p4Qb/1B6 w - - 0 1)

Eddy, Edwin John

Sunday Chronicle, 1947

(First published on Sun Apr 6 1947)

1K6/5N2/1pppn3/2Nk2p1/P3R3/1rp5/1p4Qb/1B6

#2

7 + 10

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qxg5#
    • 1...bxc5+
      • 2.Rb4#
    • 1...dxc5+
      • 2.Rf4#
  • Tries
    • 1.Re5+?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kc4!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Rc4#
      • 1...bxc5+
        • 2.Rb4#
      • 1...dxc5+
        • 2.Rf4#
      • 1...Kxc5
        • 2.Rc4#
      • 1...Sxc5
        • 2.Bc4#
      • 1...Sd4
        • 2.Re5#
      • 1...Sf4
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(j);N_GUARD,S_CUTB(b)::QAR(B),XP(f)
    • P(g);CHECK,SBLOCK,XS(E)::QAB(B)+R(D)
    • P(i);CHECK,SBLOCK,XS(E)::QAB(B)+R(D)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(B)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • B(A);
    • Threat
      • QAB(B)+R(D)
    • Vars
      • P(g);CHECK,SBLOCK,XS(E)::QAB(B)+R(D)
      • P(i);CHECK,SBLOCK,XS(E)::QAB(B)+R(D)
      • K(e);P-FLIGHT,XS(E)::R1(D)
      • S(j);SBLOCK,XS(E)::B(A)
      • S(j);SBLOCK::QAB(B)+R(D),DCHECK
      • S(j);N_GUARD,S_CUTB(b)::QAR(B),XP(f)
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