MESON Chess Problem Database

Problem Display
PID: 186183 (8/2p1p3/R2bNp2/1P1k1B2/r1Np3r/p2K1Pp1/3Q4/4R3 w - - 0 1)

Faria, Oswaldo

Chess, 1959

8/2p1p3/R2bNp2/1P1k1B2/r1Np3r/p2K1Pp1/3Q4/4R3

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.fxe4#
    • 1...Bf4
      • 2.Be4#
    • 1...Bc5
      • 2.Sxc7#
    • 1...c5
      • 2.Sb6#
    • 1...c6
      • 2.Sb6#
  • Tries
    • 1.Sxc7+?
      • 1...Kc5
        • 2.Rc6#
      • 1...Bxc7!
    • 1.Rxd6+?
      • 1...cxd6
        • 2.Sb6#
      • 1...exd6!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Sb6#
      • 1...Rxc4
        • 2.Qxc4#
      • 1...Re4
        • 2.fxe4#
      • 1...Bb4
        • 2.Sb2#
        • 2.Sd2#
        • 2.Sxa3#
        • 2.Sa5#
        • 2.Se5#
        • 2.Sd6#
      • 1...Bf4
        • 2.Be4#
      • 1...Bc5
        • 2.Sxc7#
      • 1...Be5
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(e);OGATE::P(D),XR(e)
    • B(g);S_CUTR(e)::B(G)
    • B(g);N_GUARD,SBLOCK::S(I),XP(i)
    • P(i);N_GUARD::S(E)
  • Tries
    • Try
      • S(I);CHECK,XP(i)
      • Vars
        • K(f);P-FLIGHT::R1(H)
      • Refutation
        • B(g);XS(I)
    • Try
      • R(H);CHECK,XB(g)
      • Vars
        • P(i);SBLOCK,XR(H)::S(E)
      • Refutation
        • P(j);XR(H)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+S(E),DCHECK
    • Vars
      • R(c);OGATE,P_SPINR(c),XS(E)::QAB1(B),XR(c)
      • R(e);OGATE::P(D),XR(e)
      • B(g);S_CUTR(e)::B(G)
      • B(g);N_GUARD,SBLOCK::S(I),XP(i)
      • B(g);SBLOCK::QAB(B)+S(E),DCHECK
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