MESON Chess Problem Database

Problem Display
PID: 268538 (1N2b1n1/3n3R/R1QPk1p1/1Kp1N3/5B1b/8/2B5/8 w - - 0 1)

Stubbs, Arthur Goodwin

Sunday Referee, 1929

(First published on Sun Sep 29 1929)

1N2b1n1/3n3R/R1QPk1p1/1Kp1N3/5B1b/8/2B5/8

#2

9 + 7

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Be7
      • 2.dxe7#
    • 1...Sb6
      • 2.d7#
    • 1...Sdf6
      • 2.d7#
    • 1...Sf8
      • 2.d7#
    • 1...Sgf6
      • 2.Re7#
    • 1...Se7
      • 2.dxe7#
  • Tries
    • 1.Sexd7?
      • threat
        • 2.Qe4#
      • 1...Bf6
        • 2.Sxc5#
        • 2.Sf8#
      • 1...Sf6
        • 2.Sxc5#
        • 2.Sf8#
        • 2.Re7#
      • 1...Bxd7!
    • 1.Qd5+?
      • 1...Kf6
        • 2.Sg4#
      • 1...Kxd5!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Sexd7#
      • 1...Sxe5+
        • 2.d7#
      • 1...Sb6+
        • 2.Sed7#
      • 1...Sdf6+
        • 2.d7#
      • 1...Sxb8+
        • 2.Sd7#
      • 1...Sf8+
        • 2.Sed7#
        • 2.d7#
      • 1...Kf6
        • 2.Sg4#
      • 1...Bf6
        • 2.Qc4#
      • 1...Sgf6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(a);OGATE::QAR(F)+P(G),XB(a)
    • S(e);OGATE,P_PINQ(F)::QAR(F)+P(G)
    • S(e);OGATE,P_PINQ(F),SBLOCK::QAR(F)+P(G)
    • S(g);N_GUARD,SBLOCK,S_CUTB(a)::R1(H)
    • S(g);OGATE::QAR(F)+P(G),XS(g)
  • Tries
    • Try
      • S(D);XS(e)
      • Threat
        • QAR2(F)
      • Refutation
        • B(f);P_PINQ(F),XS(D)
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT::S(D)
      • Refutation
        • K(c);S_FLIGHT,XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAR(F)+S(D),XS(e)
    • Vars
      • S(e);CHECK,OGATE,P_SPINS(e),XS(D)::R(E)+P(G)
      • S(e);CHECK::QAR(F)+S(D)
      • S(e);CHECK,OGATE,SBLOCK::R(E)+P(G)
      • S(e);CHECK,XS(I)::QAR(F)+S(D)
      • K(c);P-FLIGHT,S_CUTS(e)::S(D)
      • B(a);SBLOCK::QAB(F)
      • S(g);N_GUARD,SBLOCK,S_CUTB(a)::R1(H)
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