MESON Chess Problem Database

Problem Display
PID: 63330 (7B/8/2pP4/2pP4/2krNN1R/3p1P2/3p1p2/1R1KbQ2 w - - 0 1)

Formanek, Bedrich

1st HM., Pravda, 1974

7B/8/2pP4/2pP4/2krNN1R/3p1P2/3p1p2/1R1KbQ2

#2

10 + 8

3771 FIDE Album (1974-1976) 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Qxd3#
  • Tries
    • 1.Sxd2+?
      • 1...Kc3
        • 2.Rb3#
        • 2.Qxd3#
      • 1...Bxd2!
    • 1.Sc3?
      • 1...Kxc3
        • 2.Qxd3#
      • 1...Rxf4
        • 2.Rxf4#
      • 1...Rxd5
        • 2.Sfxd5#
      • 1...Re4
        • 2.Qxd3#
      • 1...cxd5!
    • 1.dxc6?
      • 1...Rxe4
        • 2.Qxd3#
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Rd5!
  • Keys
    • 1.Sxd3!
      • 1...Kxd5
        • 2.Sf4#
      • 1...Rxd3
        • 2.Sc3#
      • 1...Rxe4
        • 2.Sb4#
      • 1...Rxd5
        • 2.Sxd2#
      • 1...cxd5
        • 2.Se5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD,XS(E)::QAB1(C),XP(d)
  • Tries
    • Try
      • S(E);CHECK,XP(b)
      • Refutation
        • B(a);XS(E)
    • Try
      • S(E);
      • Vars
        • K(e);N_SPINP(d),P-FLIGHT,P_SPINR(f),XS(E)::QAR1(C),XP(d)
        • R(f);OGATE,P_SPINR(f),XS(F)::R(G),XR(f)
        • R(f);XP(H)::R(G)+S(F),XR(f)
        • R(f);N_GUARD::QAB1(C),XP(d)
      • Refutation
        • P(h);XP(H)
    • Try
      • P(H);XP(h)
      • Vars
        • R(f);N_GUARD,XS(E)::QAB1(C),XP(d)
        • R(f);XP(I)::S(E),XR(f)
      • Refutation
        • R(f);
  • Actual
    • S(F);XP(d)
    • Vars
      • K(e);S_FLIGHT,XP(H)::S(F)
      • R(f);P_SPINR(f),XS(F)::R(G)+S(E)
      • R(f);N_GUARD,P_SPINR(f),XS(E)::QAB(C)+S(F)
      • R(f);SBLOCK,XP(H)::R(G)+S(E),DCHECK,XP(b)
      • P(h);SBLOCK,XP(H)::QAB(C)+S(F),DCHECK
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