MESON Chess Problem Database

Problem Display
PID: 18607 (8/2b5/6p1/8/2KPkp1R/R2N3Q/4b3/6B1 w - - 0 1)

Barnes, Barry Peter

Correspondence Chess, 1957

8/2b5/6p1/8/2KPkp1R/R2N3Q/4b3/6B1

#2

7 + 5

3174 The Two-move Chess Problem Tradition and Development 1966
4199 Barnes about Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Sf2#
      • 2.Sc5#
    • 1...Bxd3+
      • 2.Qxd3#
    • 1...Bf3
      • 2.Sf2#
      • 2.Sc5#
    • 1...Bh5
      • 2.Sf2#
      • 2.Sc5#
    • 1...Ba5
      • 2.Rxf4#
    • 1...Bb6
      • 2.Rxf4#
    • 1...Bd8
      • 2.Rxf4#
  • Tries
    • 1.Qg2+?
      • 1...Bf3
        • 2.Qxg6#
      • 1...Kf5!
    • 1.Qe6+?
      • 1...Be5
        • 2.Rxf4#
      • 1...Kf3!
  • Keys
    • 1.Ra5!
      • threat
        • 2.Qe3#
      • 1...Bxd3+
        • 2.Qxd3#
      • 1...Bxa5
        • 2.Rxf4#
      • 1...Bf3
        • 2.Sc5#
      • 1...Bg4
        • 2.Sf2#
      • 1...Be5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(a);CHECK,OGATE,XS(C)::QAB1(D),XB(a)
    • B(e);N_GUARD::R1(G),XP(c)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • B(a);N_PINS(C),P_SPINB(a),SBLOCK::QAB(D),XP(d)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • B(e);P_SPINB(e)::R1(G),XP(c)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
  • Actual
    • R(B);
    • Threat
      • QAR1(D)
    • Vars
      • B(a);CHECK,OGATE,XS(C)::QAB1(D),XB(a)
      • B(e);N_GUARD,XR(B)::R1(G),XP(c)
      • B(a);N_PINS(C)::S(C)
      • B(a);N_PINS(C),N_SPINP(c)::S(C)
      • B(e);N_GUARD::R1(B),XB(e)
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