MESON Chess Problem Database

Problem Display
PID: 96450 (bBN1R3/6R1/1p3p2/2np1k2/r2P1N2/3r4/Qn4K1/1B6 w - - 0 1)

Kamstra, Hendrik Hermanus

The Chess Problem, 1948

bBN1R3/6R1/1p3p2/2np1k2/r2P1N2/3r4/Qn4K1/1B6

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Se7#
    • 1...Sb7
      • 2.Qxd5#
  • Tries
    • 1.Se2?
      • threat
        • 2.Sg3#
        • 2.Sd6#
      • 1...Sc4
        • 2.Sg3#
      • 1...Sb7
        • 2.Sg3#
        • 2.Qxd5#
      • 1...Se4!
    • 1.Sh3?
      • threat
        • 2.Sd6#
      • 1...Sc4
        • 2.Qf2#
      • 1...Sb7
        • 2.Qxd5#
      • 1...Se4!
    • 1.Sh5?
      • threat
        • 2.Sg3#
        • 2.Sd6#
      • 1...Sc4
        • 2.Sg3#
        • 2.Qf2#
      • 1...Sb7
        • 2.Sg3#
        • 2.Qxd5#
      • 1...Se4!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Sd6#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Se4
        • 2.Sde7#
      • 1...Sc4
        • 2.Qf2#
      • 1...Sb7
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(d);N_SPINR(b),SBLOCK::S(H)
    • S(d);S_CUTB(i)::QAR2(B),XP(e)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::S(E)
      • Refutation
        • S(d);N_SPINR(b)
    • Try
      • S(E);
      • Threat
        • S(H)
      • Vars
        • S(a);OGATE::QAR(B)
        • S(d);S_CUTB(i)::QAR2(B),XP(e)
      • Refutation
        • S(d);N_SPINR(b)
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Refutation
        • S(d);N_SPINR(b)
  • Actual
    • S(E);P_SPINS(E),XP(e)
    • Threat
      • S(H)
    • Vars
      • B(i);CHECK,OGATE,XS(E)::QAR2(B),XB(i)
      • S(d);N_PINS(E),N_SPINR(b),SBLOCK::S(E)
      • S(a);OGATE::QAR(B)
      • S(d);N_PINS(E)::S(E)
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Developed and maintained by Brian Stephenson.
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