MESON Chess Problem Database

Problem Display
PID: 161914 (8/8/1p2B3/1pP1RK1Q/n1Pkpp2/4p3/b1PP4/2bN4 w - - 0 1)

Hirschenson, Aaron

Sachmatija, 2009

8/8/1p2B3/1pP1RK1Q/n1Pkpp2/4p3/b1PP4/2bN4

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.dxc3#
    • 1...bxc4
      • 2.Rd5#
    • 1...bxc5
      • 2.Rxe4#
  • Tries
    • 1.Kxf4?
      • threat
        • 2.Rxe4#
      • 1...Sc3
        • 2.dxc3#
      • 1...Sxc5!
    • 1.Qe2?
      • threat
        • 2.Rd5#
      • 1...Sc3
        • 2.dxc3#
      • 1...Bxc4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qd8#
      • 1...Bxc4
        • 2.Rd5#
      • 1...Sxc5
        • 2.Rxe4#
      • 1...Sc3
        • 2.dxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(d);OGATE::P(C),XS(d)
    • P(h);SBLOCK,XP(D)::R1(F)
    • P(i);SBLOCK,XP(E)::R1(F),XP(f)
  • Tries
    • Try
      • K(G);P-FLIGHT,XP(g)
      • Threat
        • R1(F),XP(f)
      • Vars
        • S(d);OGATE::P(C),XS(d)
      • Refutation
        • S(d);XP(E)
    • Try
      • Q(H);
      • Threat
        • R1(F)
      • Vars
        • S(d);OGATE::P(C),XS(d)
      • Refutation
        • B(b);XP(D)
  • Actual
    • Q(H);
    • Threat
      • QAR(H)
    • Vars
      • B(b);SBLOCK,XP(D)::QAB(H)+R(F),DCHECK
      • S(d);SBLOCK,XP(E)::QAB(H)+R(F),DCHECK,XP(f)
      • S(d);OGATE::P(C),XS(d)
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