MESON Chess Problem Database

Problem Display
PID: 109383 (8/1pN5/1Q1B4/3Ppp1R/4k3/2Pp2p1/n2K2P1/3n4 w - - 0 1)

Sim, Malcolm

Canadian Chess Chat, 1952

8/1pN5/1Q1B4/3Ppp1R/4k3/2Pp2p1/n2K2P1/3n4

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qd4#
    • 1...Sb2
      • 2.Qe3#
    • 1...Sf2
      • 2.Qe3#
    • 1...Sdxc3
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sc1
      • 2.Qb4#
    • 1...Saxc3
      • 2.Qb4#
    • 1...Sb4
      • 2.Qxb4#
    • 1...f4
      • 2.Rxe5#
  • Tries
    • 1.Ba3?
      • 1...Sdxc3
        • 2.Qe3#
      • 1...Saxc3
        • 2.Qb4#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...f4
        • 2.Qg6#
      • 1...Kf4!
    • 1.Bf8?
      • 1...Sdxc3
        • 2.Qe3#
      • 1...Saxc3
        • 2.Qb4#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...f4
        • 2.Qg6#
      • 1...Kf4!
    • 1.Rg5?
      • 1...Sdxc3
        • 2.Qe3#
      • 1...Saxc3
        • 2.Qb4#
      • 1...f4
        • 2.Rxe5#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Kf4!
    • 1.Qc5?
      • threat
        • 2.Qc4#
      • 1...Kf4
        • 2.Qd4#
        • 2.Qc4#
      • 1...Sb2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...b5!
  • Keys
    • 1.Be7!
      • 1...Kf4
        • 2.Rh4#
      • 1...Sdxc3
        • 2.Qe3#
      • 1...Saxc3
        • 2.Qb4#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...f4
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(e);P-FLIGHT,P_SPINP(f)::QAR2(F)
    • S(a);N_GUARD::QAR1(F)
    • S(a);N_GUARD,XP(C)::QAR1(F)
    • S(a);N_GUARD::QAR1(F),XS(a)
    • S(b);N_GUARD::QAR(F)
    • S(b);N_GUARD,XP(C)::QAR(F)
    • S(b);N_GUARD::QAR(F),XS(b)
    • P(g);OGATE,SBLOCK::R1(E),XP(f)
  • Tries
    • Try
      • B(G);
      • Vars
        • S(a);N_GUARD,XP(C)::QAR1(F)
        • S(b);N_GUARD,XP(C)::QAR(F)
        • S(a);N_GUARD::QAR1(F)
        • S(a);N_GUARD::QAR1(F),XS(a)
        • S(b);N_GUARD::QAR(F)
        • S(b);N_GUARD::QAR(F),XS(b)
        • P(g);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • B(G);
      • Vars
        • S(a);N_GUARD,XP(C)::QAR1(F)
        • S(b);N_GUARD,XP(C)::QAR(F)
        • S(a);N_GUARD::QAR1(F)
        • S(a);N_GUARD::QAR1(F),XS(a)
        • S(b);N_GUARD::QAR(F)
        • S(b);N_GUARD::QAR(F),XS(b)
        • P(g);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(E);
      • Vars
        • S(a);N_GUARD,XP(C)::QAR1(F)
        • S(b);N_GUARD,XP(C)::QAR(F)
        • P(g);OGATE,SBLOCK::R1(E),XP(f)
        • S(a);N_GUARD::QAR1(F)
        • S(a);N_GUARD::QAR1(F),XS(a)
        • S(b);N_GUARD::QAR(F)
        • S(b);N_GUARD::QAR(F),XS(b)
      • Refutation
        • K(e);P-FLIGHT,P_SPINP(f)
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • S(a);N_GUARD::QAR1(F)
        • S(a);N_GUARD::QAR1(F),XS(a)
      • Refutation
        • P(h);
  • Actual
    • B(G);
    • Vars
      • K(e);P-FLIGHT::R(E)
      • S(a);N_GUARD,XP(C)::QAR1(F)
      • S(b);N_GUARD,XP(C)::QAR(F)
      • S(a);N_GUARD::QAR1(F)
      • S(a);N_GUARD::QAR1(F),XS(a)
      • S(b);N_GUARD::QAR(F)
      • S(b);N_GUARD::QAR(F),XS(b)
      • P(g);OGATEB,SBLOCK::QAB(F)
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