MESON Chess Problem Database

Problem Display
PID: 120223 (3r3b/p5r1/4p3/K2b4/2p2p2/P3R2N/R7/Q1B1Nk1n w - - 0 1)

Hjelle, David

Nieuw Nederland, 1947

3r3b/p5r1/4p3/K2b4/2p2p2/P3R2N/R7/Q1B1Nk1n

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Rxf2#
    • 1...Sg3
      • 2.Rf2#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Re1#
      • 1...fxe3
        • 2.Bxe3#
      • 1...Sf2
        • 2.Rxf2#
      • 1...cxd3!
    • 1.Sf3?
      • threat
        • 2.Sh2#
        • 2.Re1#
      • 1...fxe3
        • 2.Bxe3#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Rg2
        • 2.Bb2#
        • 2.Re1#
      • 1...Bxf3!
  • Keys
    • 1.Sg2!
      • threat
        • 2.Re1#
      • 1...Rxg2
        • 2.Bb2#
      • 1...Bxg2
        • 2.Bd2#
      • 1...fxe3
        • 2.Bxe3#
      • 1...Sf2
        • 2.Rxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD::R1(D),XS(b)
    • S(b);N_GUARD::R1(D)
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(F)
      • Vars
        • P(d);OGATE,XR(F)::QAR(A)+B(B),XP(d)
        • S(b);N_GUARD::R1(D),XS(b)
      • Refutation
        • P(c);XS(C)
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);OGATE,XR(F)::QAR(A)+B(B),XP(d)
        • S(b);N_GUARD::R1(D),XS(b)
      • Refutation
        • B(e);XS(C)
  • Actual
    • S(C);
    • Threat
      • R1(F)
    • Vars
      • R(h);SBLOCK,XS(C)::QAR(A)+B(B)
      • B(e);SBLOCK,XS(C)::QAR(A)+B(B)
      • P(d);OGATE,XR(F)::QAR(A)+B(B),XP(d)
      • S(b);N_GUARD::R1(D),XS(b)
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