MESON Chess Problem Database

Problem Display
PID: 60862 (1B6/1Np5/8/Rn1nkp1Q/2RNb3/1B1p1pK1/3P1P2/8 w - - 0 1)

Albarda, Johannes

2nd Prize, Probleemblad TT, 1973

1B6/1Np5/8/Rn1nkp1Q/2RNb3/1B1p1pK1/3P1P2/8

#2

10 + 8

3753 FIDE Album (1971-1973) 1978
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Qh8#
    • 1...Sbc3
      • 2.Qh8#
    • 1...Sd6
      • 2.Qh8#
    • 1...Sa7
      • 2.Qh8#
  • Tries
    • 1.Qf7?
      • threat
        • 2.Sc6#
        • 2.Qe6#
      • 1...Sxd4
        • 2.Bxc7#
      • 1...Sa7
        • 2.Bxc7#
        • 2.Qe6#
        • 2.Qe7#
        • 2.Qg7#
      • 1...Sdc3
        • 2.Bxc7#
        • 2.Qe6#
      • 1...Se3
        • 2.Bxc7#
        • 2.Qe6#
      • 1...Sb4
        • 2.Bxc7#
        • 2.Qe6#
      • 1...Sf4
        • 2.Bxc7#
      • 1...Sb6
        • 2.Bxc7#
        • 2.Qe6#
      • 1...Sf6
        • 2.Bxc7#
        • 2.Qe6#
      • 1...Se7
        • 2.Bxc7#
        • 2.Qe6#
      • 1...f4+!
  • Keys
    • 1.Rxc7!
      • 1...Kxd4
        • 2.Rc4#
      • 1...Kf6
        • 2.Rf7#
      • 1...Sxd4
        • 2.Rc6#
      • 1...Sbxc7
        • 2.Qh8#
      • 1...Sdxc7
        • 2.Qh8#
      • 1...Sa3
        • 2.Qh8#
      • 1...Sbc3
        • 2.Qh8#
      • 1...Sd6
        • 2.Qh8#
      • 1...Sa7
        • 2.Qh8#
      • 1...Sdc3
        • 2.Qh8#
      • 1...Se3
        • 2.Qh8#
      • 1...Sb4
        • 2.Qh8#
      • 1...Sf4
        • 2.Qh8#
      • 1...Sb6
        • 2.Qh8#
      • 1...Sf6
        • 2.Rd7#
      • 1...Se7
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • S(d);P_SPINS(e)::QAB(H)
  • Tries
    • Try
      • Q(H);N_PINP(g),P_PINP(h)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);N_GUARD,P_SPINS(e),XS(F)::B(J),XP(h)
        • S(e);N_GUARD,P_SPINS(d)::B(J),XP(h)
      • Refutation
        • P(g);CHECK
  • Actual
    • R(E);XP(h)
    • Vars
      • K(f);N_SPINP(g),S_FLIGHT,XS(F)::R1(E)
      • K(f);N_SPINP(g),S_FLIGHT::R1(E)
      • S(d);N_GUARD,P_SPINS(e),SBLOCK,XS(F)::B(J)+R(E)
      • S(d);P_SPINS(e),XR(E)::QAB(H)
      • S(e);N_GUARD,P_SPINS(d),XR(E)::QAB(H)
      • S(d);P_SPINS(e)::QAB(H)
      • S(e);N_GUARD,P_SPINS(d)::QAB(H)
      • S(e);N_GUARD,P_SPINS(d),SBLOCK::B(J)+R(E)
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