MESON Chess Problem Database

Problem Display
PID: 193415 (B4BQ1/1rp2R1K/N2PP3/n2kN2R/7p/2P2P1r/5n2/8 w - - 0 1)

Janet, Frank

Pittsburgh Gazette-Times, 1914

B4BQ1/1rp2R1K/N2PP3/n2kN2R/7p/2P2P1r/5n2/8

#2

12 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Rf4#
      • 2.Rff5#
    • 1...c5
      • 2.Sc7#
  • Tries
    • 1.Sc4+?
      • 1...Kc6
        • 2.Sb4#
        • 2.Sb8#
        • 2.Rc5#
        • 2.Rxc7#
      • 1...Kxe6
        • 2.Sc5#
        • 2.Re5#
        • 2.Qg6#
      • 1...Kxc4!
    • 1.Sd7+?
      • 1...Kc6
        • 2.Sb4#
        • 2.Sab8#
        • 2.Rc5#
      • 1...Kxe6
        • 2.Sac5#
        • 2.Sdc5#
        • 2.Re5#
        • 2.Rg7#
        • 2.Qg6#
      • 1...Kc4!
    • 1.Sb4+?
      • 1...Kxe6
        • 2.Rf4#
        • 2.Rff5#
        • 2.Qg6#
      • 1...Kc5!
    • 1.Rd7?
      • threat
        • 2.dxc7#
        • 2.e7#
      • 1...cxd6
        • 2.e7#
      • 1...Rg3
        • 2.dxc7#
      • 1...Se4
        • 2.e7#
      • 1...Sc4
        • 2.e7#
      • 1...c5
        • 2.Sc7#
        • 2.e7#
      • 1...c6
        • 2.e7#
      • 1...Rxf3!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Rd4#
      • 1...cxd6+
        • 2.e7#
      • 1...c5+
        • 2.Sc7#
      • 1...c6+
        • 2.Sd7#
      • 1...Se4
        • 2.fxe4#
      • 1...Sb3
        • 2.c4#
      • 1...Sc6
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(g);P_PINR(H),SBLOCK::S(E)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(e);N_SPINR(f),S_FLIGHT,XS(C)
    • Try
      • S(C);CHECK
      • Refutation
        • K(e);N_SPINR(f),S_FLIGHT
    • Try
      • S(E);CHECK
      • Refutation
        • K(e);N_SPINR(f),P-FLIGHT
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);P_PINR(H),P_SPINP(g),XP(F)::QAB(L)+P(G)
        • R(b);::R(H)+P(F),XP(g)
        • S(a);::QAB(L)+P(G)
        • S(d);::QAB(L)+P(G)
        • P(g);N_SPINR(f),P_PINR(H)::QAB(L)+P(G)
      • Refutation
        • R(b);XP(B)
  • Actual
    • R(H);
    • Threat
      • R1(H)
    • Vars
      • P(g);CHECK,SBLOCK,XP(F)::QAB(L)+P(G)
      • P(g);CHECK,SBLOCK::S(E)
      • P(g);CHECK,N_SPINR(f),SBLOCK::R(D)+S(C)
      • S(a);OGATE::P(B),XS(a)
      • S(d);N_GUARD::P(A)
      • S(d);N_GUARD,N_SPINR(f)::P(A)
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