MESON Chess Problem Database

Problem Display
PID: 7287 (4b1n1/2p2P2/Q5N1/KPPP2R1/1nk5/2PN3r/2BPPr2/6B1 w - - 0 1)

Navon, Emanuel

5th Comm., Netanya (Internet), 1999

4b1n1/2p2P2/Q5N1/KPPP2R1/1nk5/2PN3r/2BPPr2/6B1

#2

14 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Sb2#
    • 1...Rxe2
      • 2.Sb2#
    • 1...Rg2
      • 2.Sb2#
    • 1...Rfh2
      • 2.Sb2#
    • 1...Rff3
      • 2.Sb2#
    • 1...Rf4
      • 2.Sb2#
    • 1...Rf6
      • 2.Sb2#
    • 1...Rxf7
      • 2.Sb2#
    • 1...Bxb5
      • 2.Qxb5#
    • 1...Sxd5
      • 2.Sge5#
    • 1...Sc6+
      • 2.bxc6#
  • Tries
    • 1.Rg4+?
      • 1...Kxd5
        • 2.Bb3#
        • 2.Rd4#
        • 2.c4#
      • 1...Rf4!
    • 1.b6+?
      • 1...Bb5
        • 2.Qxb5#
      • 1...Sxa6!
  • Keys
    • 1.Sb2+!
      • 1...Kxc5
        • 2.d4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • R(a);::S(F)
    • R(a);XP(D)::S(F)
    • R(a);XP(N)::S(F)
    • B(f);OGATE,P_SPINB(f),XP(H)::QAB1(L),XB(f)
    • S(c);SBLOCK,XP(J)::S(M)
    • S(c);CHECK,OGATE::QAB(L)+P(H),XS(c)
  • Tries
    • Try
      • R(K);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • P(H);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAB1(L),XB(f)
      • Refutation
        • S(c);XQ(L)
  • Actual
    • S(F);CHECK
    • Vars
      • K(d);P-FLIGHT,P_SPINR(a),XP(I)::P(C)
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