MESON Chess Problem Database

Problem Display
PID: 101638 (6nN/4p2b/4P2P/3P1k2/8/3pK2n/4N1R1/B2B4 w - - 0 1)

Larrain, Santiago

Northwest Chess, 1978

6nN/4p2b/4P2P/3P1k2/8/3pK2n/4N1R1/B2B4

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Sg3#
    • 1...dxe2
      • 2.Bc2#
    • 1...d2
      • 2.Bc2#
  • Tries
    • 1.Bg7?
      • threat
        • 2.Sd4#
      • 1...dxe2
        • 2.Bc2#
      • 1...Sf6!
    • 1.Rg5+?
      • 1...Sxg5
        • 2.Sg3#
      • 1...Kxg5!
    • 1.Rg6?
      • threat
        • 2.Sg3#
      • 1...dxe2
        • 2.Bc2#
      • 1...Bxg6!
    • 1.Rg7?
      • threat
        • 2.Sg3#
      • 1...dxe2
        • 2.Bc2#
      • 1...Bg6!
  • Keys
    • 1.Sf7!
      • 1...Sxh6
        • 2.Sxh6#
      • 1...dxe2
        • 2.Bc2#
      • 1...Sg5
        • 2.Rxg5#
      • 1...Bg6
        • 2.Sg3#
      • 1...Sg1
        • 2.Rg5#
      • 1...Sf2
        • 2.Rg5#
      • 1...Sf4
        • 2.Rg5#
      • 1...Sf6
        • 2.Sd4#
      • 1...d2
        • 2.Bc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK::S(C)
    • P(a);OGATEB,XS(C)::B(B)
    • P(a);OGATEB::B(B)
  • Tries
    • Try
      • B(A);
      • Threat
        • S(C)
      • Vars
        • P(a);OGATEB,XS(C)::B(B)
      • Refutation
        • S(f);
    • Try
      • R(D);CHECK
      • Vars
        • S(b);SBLOCK,XR(D)::S(C)
      • Refutation
        • K(c);P-FLIGHT,XR(D)
    • Try
      • R(D);
      • Threat
        • S(C)
      • Vars
        • P(a);OGATEB,XS(C)::B(B)
      • Refutation
        • B(e);XR(D)
    • Try
      • R(D);
      • Threat
        • S(C)
      • Vars
        • P(a);OGATEB,XS(C)::B(B)
      • Refutation
        • B(e);
  • Actual
    • S(I);
    • Vars
      • S(f);XP(H)::S(I),XS(f)
      • P(a);OGATEB,XS(C)::B(B)
      • S(b);N_GUARD::R1(D),XS(b)
      • B(e);SBLOCK::S(C)
      • S(b);N_GUARD::R1(D)
      • S(f);SBLOCK::S(C)
      • P(a);OGATEB::B(B)
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