MESON Chess Problem Database

Problem Display
PID: 21328 (r1nrn1q1/RP1P1P1R/3k2P1/1P2N3/6P1/2Q5/B7/K7 w - - 0 1)

Stimson, James Frank (Ua Tane)

Good Companions (February), 1918

r1nrn1q1/RP1P1P1R/3k2P1/1P2N3/6P1/2Q5/B7/K7

#2

12 + 6

756 Norsk Sjakkblad 1919
3132 The Good Companion Two-Mover 1922
3360 Simple Two-move Themes 1924
20 De Problemist 1929
887 Mate in Two Moves 1931
1397 Faszinierendes Schachproblem 1963
3098 FIDE Album (1914-1944) (I) 1971
12701 Brazilian Solving Championship 2002-2003
5405 Chess Solving Yearbook 2003 2004

SOLUTION

  • SOUND
  • Tries
    • 1.Qd4+?
      • 1...Kc7
        • 2.bxc8Q#
        • 2.bxc8R#
      • 1...Ke7!
    • 1.Qc6+?
      • 1...Ke7
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Kxe5!
    • 1.f8Q+?
      • 1...Se7
        • 2.Qxe7#
      • 1...Qxf8!
    • 1.f8B+?
      • 1...Se7
        • 2.Bxe7#
      • 1...Qxf8!
  • Keys
    • 1.Sc4+!
      • 1...Kc5
        • 2.Rh5#
      • 1...Kd5
        • 2.Qe5#
      • 1...Ke6
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Kc7
        • 2.bxc8Q#
        • 2.bxc8R#
      • 1...Kxd7
        • 2.f8S#
      • 1...Ke7
        • 2.fxe8Q#
        • 2.fxe8R#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::PXS(c)=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::PXS(e)=Q
      • Refutation
        • K(a);S_FLIGHT,XS(F)
    • Try
      • P(K);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(K),XS(c)
      • Refutation
        • Q(f);XQ(K)
    • Try
      • P(K);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(K),XS(c)
      • Refutation
        • Q(f);XB(K)
  • Actual
    • S(F);CHECK
    • Vars
      • K(a);S_FLIGHT::R(L)
      • K(a);P-FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::PXQ(f)=Q
      • K(a);S_FLIGHT::PXS(c)=Q
      • K(a);P-FLIGHT,XP(J)::P=S
      • K(a);S_FLIGHT::PXS(e)=Q
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