MESON Chess Problem Database

Problem Display
PID: 56197 (4Q3/5Bp1/4K3/2PN2Bn/R1Pk1r1R/2pN1P2/2ppP3/2bn2r1 w - - 0 1)

Larrain, Santiago

Comm.=, Themes-64, 1985

4Q3/5Bp1/4K3/2PN2Bn/R1Pk1r1R/2pN1P2/2ppP3/2bn2r1

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Re4+
      • 2.Rxe4#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sxc2#
        • 2.Sf5#
      • 1...Re4+
        • 2.Rxe4#
      • 1...Kxe3
        • 2.Kd5#
      • 1...Rxg5
        • 2.Sxc2#
      • 1...Rgg4
        • 2.Sxc2#
      • 1...Sg3
        • 2.Sxc2#
      • 1...g6
        • 2.Sxc2#
      • 1...Sxe3!
    • 1.Bxf4?
      • threat
        • 2.Be3#
        • 2.Be5#
      • 1...Sxf4+
        • 2.Rxf4#
      • 1...Rg4
        • 2.Be5#
      • 1...Se3
        • 2.Bxe3#
        • 2.Be5#
      • 1...Rg6+!
  • Keys
    • 1.S5b4!
      • threat
        • 2.Sxc2#
      • 1...Re4+
        • 2.Rxe4#
      • 1...Ke3
        • 2.Kd5#
      • 1...Kxc4
        • 2.Ke5#
      • 1...Se3
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(h);CHECK,OGATE::R1(F),XR(h)
  • Tries
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);CHECK,OGATE::R1(F),XR(h)
        • K(g);S_FLIGHT,XS(H)::QAR(L)+K(J)
        • R(c);XB(I)::S(H),XP(d)
        • R(c);N_SPINR(h)::S(H),XP(d)
        • S(i);::S(H),XP(d)
        • P(j);::S(H),XP(d)
      • Refutation
        • S(b);XS(H)
    • Try
      • B(I);XR(h)
      • Threat
        • DUALS(2)
      • Vars
        • S(i);CHECK,OGATE,P_SPINS(i),XB(I)::R(F),XS(i)
        • R(c);::B(I)
      • Refutation
        • R(c);CHECK
  • Actual
    • S(H);
    • Threat
      • S(H),XP(d)
    • Vars
      • R(h);CHECK,OGATE::R1(F),XR(h)
      • K(g);S_FLIGHT::QAR(L)+K(J)
      • K(g);P-FLIGHT,XP(E)::B(K)+K(J)
      • S(b);SBLOCK::S(H)
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