MESON Chess Problem Database

Problem Display
PID: 63085 (5R2/3B1npN/q3rbn1/p1Rb1krP/3p2p1/3Pp1B1/4Q3/4KN2 w - - 0 1)

Caine, Walter Edmund

Chess, 1944

5R2/3B1npN/q3rbn1/p1Rb1krP/3p2p1/3Pp1B1/4Q3/4KN2

#2

10 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3
      • 2.Qxd3#
  • Tries
    • 1.Qf3+?
      • 1...Sf4
        • 2.Qe4#
        • 2.Qxf4#
      • 1...gxf3!
    • 1.Qf2+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...exf2+!
  • Keys
    • 1.Qxe3!
      • threat
        • 2.Qe4#
      • 1...Qxd3
        • 2.Bxe6#
        • 2.Qxe6#
      • 1...dxe3
        • 2.Sxe3#
      • 1...Be5
        • 2.Qxg5#
      • 1...Sge5
        • 2.Qf4#
      • 1...Sfe5
        • 2.Qxg5#
      • 1...Sd6
        • 2.Bxe6#
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(h);OGATE,XP(D)::QAB(C),XQ(h)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • S(k);N_GUARD,P_SPINS(k)::QAR1(C),XS(k)
      • Refutation
        • P(a);CHECK,XQ(C)
  • Actual
    • Q(C);P_SPINQ(C),XP(a)
    • Threat
      • QAB1(C)
    • Vars
      • P(b);XQ(C)::S(B),XP(b)
      • B(j);N_PINQ(C),N_SPINB(e),P_SPINS(l)::QAR1(C),XR(g)
      • S(k);N_PINQ(C),N_SPINB(e)::QAR1(C)
      • S(l);N_PINQ(C),N_SPINB(e),P_SPINB(j)::QAR1(C),XR(g)
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Developed and maintained by Brian Stephenson.
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