MESON Chess Problem Database

Problem Display
PID: 186703 (2R3NK/2pBb1n1/2bp4/2PkrP2/pQ1B4/2p2P1p/8/q2R3r w - - 0 1)

Collins, PM

Chess, 1960

2R3NK/2pBb1n1/2bp4/2PkrP2/pQ1B4/2p2P1p/8/q2R3r

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Bg1#
    • 1...Rxf5
      • 2.Sxe7#
    • 1...Bf6
      • 2.Sxf6#
    • 1...Bf8
      • 2.Sf6#
    • 1...Se6
      • 2.Sxe7#
    • 1...a3
      • 2.Qb3#
  • Tries
    • 1.Be6+?
      • 1...Sxe6
        • 2.Sxe7#
      • 1...Rxe6!
  • Keys
    • 1.cxd6!
      • threat
        • 2.Qc5#
      • 1...Bxd6
        • 2.Sf6#
      • 1...cxd6
        • 2.Bxc6#
      • 1...Qa3
        • 2.Bg1#
      • 1...Se6
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::R(A)+B(D)
    • R(g);N_GUARD,XP(F)::S(I),XB(k)
    • B(k);N_GUARD::S(I),XB(k)
    • B(k);N_GUARD::S(I)
    • S(l);S_CUTR(g)::S(I),XB(k)
    • P(e);N_GUARD::QAB(C)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • S(l);XB(G)::S(I),XB(k)
      • Refutation
        • R(g);XB(G)
  • Actual
    • P(E);XP(i)
    • Threat
      • QAR1(C)
    • Vars
      • B(k);N_GUARD,XP(E)::S(I)
      • P(j);XP(E)::B(G),XB(h)
      • Q(a);N_GUARD::R(A)+B(D)
      • S(l);S_CUTR(g)::S(I),XB(k)
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