MESON Chess Problem Database

Problem Display
PID: 195184 (8/b7/8/5Q2/8/7B/1P2ppR1/KN2Nk2 w - - 0 1)

Sparke, Arthur M

Pittsburgh Gazette-Times, 1918

8/b7/8/5Q2/8/7B/1P2ppR1/KN2Nk2

#2

7 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bb8
      • 2.Qxf2#
  • Tries
    • 1.Rh2+?
      • 1...Kg1
        • 2.Sf3#
      • 1...Kxe1!
    • 1.Qg4?
      • threat
        • 2.Rg1#
      • 1...fxe1Q
        • 2.Rxe2#
        • 2.Rh2#
      • 1...fxe1S
        • 2.Sd2#
        • 2.Qxe2#
      • 1...fxe1B
        • 2.Rxe2#
        • 2.Rh2#
        • 2.Qxe2#
      • 1...fxe1R
        • 2.Rxe2#
        • 2.Rh2#
      • 1...Kxe1!
    • 1.Qg6?
      • threat
        • 2.Rg1#
      • 1...fxe1Q
        • 2.Rh2#
      • 1...fxe1S
        • 2.Sd2#
      • 1...fxe1B
        • 2.Rh2#
      • 1...fxe1R
        • 2.Rh2#
      • 1...Kxe1!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Rg1#
      • 1...Kxe1
        • 2.Qc1#
      • 1...fxe1Q
        • 2.Rh2#
      • 1...fxe1S
        • 2.Sd2#
      • 1...fxe1B
        • 2.Rh2#
      • 1...fxe1R
        • 2.Rh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(d);N_GUARD::QAR1(G),XP(c)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::S(C)
      • Refutation
        • K(a);N_SPINP(c),P-FLIGHT,XS(C)
    • Try
      • Q(G);N_PINP(c)
      • Threat
        • B(F)+R(E),DCHECK
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(G);N_PINP(c)
      • Threat
        • B(F)+R(E),DCHECK
      • Vars
        • P(c);P_PINS(B),SBLOCK,XS(C)::B(F)+R(E)
        • P(c);SBLOCK,XS(C)::S(B)
        • P(c);SBLOCK,XS(C)::B(F)+R(E)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
  • Actual
    • Q(G);N_PINP(c)
    • Threat
      • B(F)+R(E),DCHECK
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(G)
      • P(c);P_PINS(B),SBLOCK,XS(C)::B(F)+R(E)
      • P(c);SBLOCK,XS(C)::S(B)
      • P(c);SBLOCK,XS(C)::B(F)+R(E)
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