MESON Chess Problem Database

Problem Display
PID: 232735 (1N1k1bQ1/3ppPN1/1PR3n1/R2B3b/4K1p1/6P1/8/8 w - - 0 1)

Hahnel, Peter

Freie Presse, 1993

1N1k1bQ1/3ppPN1/1PR3n1/R2B3b/4K1p1/6P1/8/8

#2

10 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qxf8#
    • 1...Sh4
      • 2.Qxf8#
    • 1...Se5
      • 2.Qxf8#
    • 1...Sh8
      • 2.Qxf8#
    • 1...d6
      • 2.Se6#
  • Tries
    • 1.Ra7?
      • threat
        • 2.Rxd7#
      • 1...Se5
        • 2.Qxf8#
      • 1...d6
        • 2.Se6#
        • 2.Rd7#
      • 1...dxc6!
    • 1.Rxg6?
      • threat
        • 2.Qxf8#
      • 1...Kc8
        • 2.Qxf8#
      • 1...Bxg6+!
  • Keys
    • 1.Be6!
      • 1...d5+
        • 2.Rxd5#
      • 1...dxc6
        • 2.Sxc6#
      • 1...dxe6
        • 2.Sxe6#
      • 1...Sf4
        • 2.Qxf8#
      • 1...Sh4
        • 2.Qxf8#
      • 1...Se5
        • 2.Qxf8#
      • 1...Sh8
        • 2.Qxf8#
      • 1...d6
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAR2(J),XB(g)
    • P(d);N_GUARD::S(H)
  • Tries
    • Try
      • R(C);
      • Threat
        • R1(C),XP(d)
      • Vars
        • S(c);N_GUARD::QAR2(J),XB(g)
      • Refutation
        • P(d);XR(F)
    • Try
      • R(F);XS(c)
      • Threat
        • QAR2(J),XB(g)
      • Vars
        • K(f);P-FLIGHT::QAR(J),XB(g)
      • Refutation
        • B(b);CHECK,XR(F)
  • Actual
    • B(D);
    • Vars
      • P(d);CHECK,OGATEB::R(C),XP(d)
      • P(d);XR(F)::S(I),XP(d)
      • P(d);XB(D)::S(H),XP(d)
      • S(c);N_GUARD::QAR2(J),XB(g)
      • P(d);::R1(F)
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