MESON Chess Problem Database

Problem Display
PID: 105363 (2K5/5p2/p1k2p2/r1P5/p1Q2N2/p7/n7/8 w - - 0 1)

Bunka, Vladislav

Praca, 1973

2K5/5p2/p1k2p2/r1P5/p1Q2N2/p7/n7/8

#2

4 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Qd5#
    • 1...Rxc5
      • 2.Qxa6#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sd4#
        • 2.Sd8#
      • 1...Rxc5
        • 2.Qxc5#
      • 1...fxe6!
  • Keys
    • 1.Sd3!
      • 1...Rxc5
        • 2.Qxc5#
      • 1...Rb5
        • 2.Qe4#
      • 1...Sc1
        • 2.Sb4#
      • 1...Sc3
        • 2.Sb4#
      • 1...Sb4
        • 2.Sxb4#
      • 1...f5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK::QAB1(A)
    • R(d);N_GUARD,P_SPINR(d),SBLOCK,XP(C)::QAR2(A),XP(e)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);OGATE,P_SPINR(d),XP(C)::QAR1(A),XR(d)
      • Refutation
        • P(h);XS(B)
  • Actual
    • S(B);
    • Vars
      • R(d);OGATE,P_SPINR(d),XP(C)::QAR1(A),XR(d)
      • R(d);SBLOCK::QAB(A)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
      • P(g);N_GUARD::S(B)
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