MESON Chess Problem Database

Problem Display
PID: 124534 (8/6p1/3p2Q1/3P4/2prpP2/2pk1B2/2p3N1/2K5 w - - 0 1)

Hjelle, David

To Mat, 1954

8/6p1/3p2Q1/3P4/2prpP2/2pk1B2/2p3N1/2K5

#2

6 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Qxe4#
  • Tries
    • 1.Se3?
      • 1...Rxd5
        • 2.Qxe4#
      • 1...Kxe3!
    • 1.Sh4?
      • 1...Rxd5
        • 2.Qxe4#
      • 1...Ke3!
    • 1.Qg4?
      • threat
        • 2.Be2#
      • 1...exf3
        • 2.Qxf3#
      • 1...e3
        • 2.Se1#
      • 1...Rxd5!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Be2#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...exf3
        • 2.Qxf3#
      • 1...e3
        • 2.Se1#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(e);N_GUARD,XP(E)::QAB1(F),XP(f)
  • Tries
    • Try
      • S(B);
      • Vars
        • R(e);N_GUARD,XP(E)::QAB1(F),XP(f)
      • Refutation
        • K(c);N_SPINP(f),P-FLIGHT,XS(B)
    • Try
      • S(B);
      • Vars
        • R(e);N_GUARD,XP(E)::QAB1(F),XP(f)
      • Refutation
        • K(c);N_SPINP(f),P-FLIGHT
    • Try
      • Q(F);N_PINP(f)
      • Threat
        • B(C)
      • Vars
        • P(f);OGATE,XB(C)::QAR2(F),XP(f)
        • P(f);SBLOCK::S(B)
      • Refutation
        • R(e);XP(E)
  • Actual
    • Q(F);N_PINP(f)
    • Threat
      • B(C)
    • Vars
      • R(e);OGATE,XP(E)::QAR2(F),XR(e)
      • P(f);OGATE,XB(C)::QAR2(F),XP(f)
      • P(f);SBLOCK::S(B)
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