MESON Chess Problem Database

Problem Display
PID: 161228 (6R1/8/7B/4pp1K/4N2p/3bPk2/Q4b2/3n1R2 w - - 0 1)

Healey, Percy E

Schlesische Zeitung, 1914

6R1/8/7B/4pp1K/4N2p/3bPk2/Q4b2/3n1R2

#2

7 + 7

15351 SCPF/BCPS Black Books 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qa8#
    • 1...Be2
      • 2.Sd2#
  • Tries
    • 1.Rxf2+?
      • 1...Kxe4
        • 2.Qa8#
      • 1...Sxf2!
    • 1.Rg3+?
      • 1...Kxe4
        • 2.Qa8#
      • 1...hxg3!
    • 1.Qxf2+?
      • 1...Kxe4
        • 2.Qg2#
        • 2.Qf3#
      • 1...Sxf2!
  • Keys
    • 1.Re1!
      • threat
        • 2.Sd2#
      • 1...Kxe4
        • 2.Qa8#
      • 1...Bxe1
        • 2.Qg2#
      • 1...Bxe3
        • 2.Qg2#
      • 1...Bxe4
        • 2.Qe2#
      • 1...fxe4
        • 2.Qf7#
      • 1...Bg1
        • 2.Qg2#
      • 1...Bg3
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINB(b),OGATEB,S_FLIGHT,XS(D)::QAB(B)
    • B(c);SBLOCK::S(D)
  • Tries
    • Try
      • R(A);CHECK,XB(b)
      • Vars
        • K(d);S_FLIGHT,XS(D)::QAB(B)
      • Refutation
        • S(a);XR(A)
    • Try
      • R(G);CHECK
      • Vars
        • K(d);N_SPINB(b),S_FLIGHT,XS(D)::QAB(B)
      • Refutation
        • P(e);XR(G)
    • Try
      • Q(B);CHECK,XB(b)
      • Refutation
        • S(a);P_SPINS(a),XQ(B)
  • Actual
    • R(A);N_PINB(b)
    • Threat
      • S(D)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(D)::QAB(B)
      • B(b);OGATE,XR(A)::QAB1(B)
      • B(b);OGATE,XP(C)::QAB1(B)
      • B(c);N_GUARD,SBLOCK,XS(D)::QAB1(B)
      • P(g);OGATEB,SBLOCK,XS(D)::QAR(B)
      • B(b);OGATE::QAB1(B)
      • B(b);SBLOCK::S(D)
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