MESON Chess Problem Database

Problem Display
PID: 10237 (1bK5/1p1Q3B/4p3/3NBn2/1PN5/1bPkrp2/5r2/7R w - - 0 1)

Rice, John Michael

Correspondence Chess, 1963

1bK5/1p1Q3B/4p3/3NBn2/1PN5/1bPkrp2/5r2/7R

#2

9 + 9

3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Kc2
      • 2.Sdxe3#
    • 1...Ke2
      • 2.Sf4#
    • 1...Kxc4
      • 2.Sb6#
    • 1...Ke4
      • 2.Sf6#
  • Tries
    • 1.Sdxe3+?
      • 1...Ke2
        • 2.Qd2#
      • 1...Ke4
        • 2.Rh4#
        • 2.Qd4#
      • 1...Bd6!
    • 1.Sf4+?
      • 1...Kc2
        • 2.Qd1#
      • 1...Ke4
        • 2.Qd4#
        • 2.Qxb7#
      • 1...Kxc4!
    • 1.Sdb6+?
      • 1...Kc2
        • 2.Qd1#
      • 1...Ke2
        • 2.Qd2#
      • 1...Ke4
        • 2.Rh4#
        • 2.Qd4#
      • 1...Bd6!
  • Keys
    • 1.Sc7+!
      • 1...Kc2
        • 2.Qd1#
      • 1...Ke2
        • 2.Qd2#
      • 1...Kxc4
        • 2.Qb5#
      • 1...Ke4
        • 2.Rh4#
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(c);S_FLIGHT::S(E),XR(d)
    • K(c);N_SPINS(f),S_FLIGHT::S(E)
    • K(c);N_SPINS(f),S_FLIGHT,XS(D)::S(E)
    • K(c);S_FLIGHT::S(E)
  • Tries
    • Try
      • S(E);CHECK,XR(d)
      • Vars
        • K(c);N_SPINS(f),OGATE,S_FLIGHT::QAR1(G)
      • Refutation
        • B(i);P_SPINB(i)
    • Try
      • S(E);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(G)
      • Refutation
        • K(c);N_SPINS(f),S_FLIGHT,XS(D)
    • Try
      • S(E);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(G)
        • K(c);N_SPINS(f),OGATE,S_FLIGHT::QAR1(G)
      • Refutation
        • B(i);P_SPINB(i)
  • Actual
    • S(E);CHECK
    • Vars
      • K(c);OGATE,S_FLIGHT::QAB1(G)
      • K(c);N_SPINS(f),OGATE,S_FLIGHT::QAR1(G)
      • K(c);N_SPINS(f),OGATEB,S_FLIGHT,XS(D)::QAB1(G)
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