MESON Chess Problem Database

Problem Display
PID: 157003 (4R3/r1p2Q2/n2pp3/N1Nk2P1/3pRBB1/3pn2r/b6p/7K w - - 0 1)

Alekseev, Yuri Mikhailovich

Hlas l'udu, 1985

4R3/r1p2Q2/n2pp3/N1Nk2P1/3pRBB1/3pn2r/b6p/7K

#2

9 + 12

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...dxc5
      • 2.Qxe6#
  • Tries
    • 1.R4xe6?
      • threat
        • 2.Re5#
      • 1...dxc5
        • 2.Rxe3#
        • 2.Re4#
        • 2.Rxa6#
        • 2.Rb6#
        • 2.Rc6#
        • 2.Rd6#
        • 2.Rf6#
        • 2.Rg6#
        • 2.Rh6#
        • 2.R6e7#
        • 2.Rd8#
        • 2.Qd7#
      • 1...Kxc5!
    • 1.R8xe6?
      • threat
        • 2.R6e5#
      • 1...dxc5
        • 2.R4e5#
        • 2.Re7#
        • 2.Re8#
        • 2.Qd7#
      • 1...Kxc5!
    • 1.Qd7?
      • threat
        • 2.Re5#
        • 2.Qc6#
      • 1...Sxg4
        • 2.Qc6#
      • 1...Sc4
        • 2.Qc6#
      • 1...Sb4
        • 2.Re5#
      • 1...Sb8
        • 2.Re5#
      • 1...e5
        • 2.R4xe5#
        • 2.R8xe5#
        • 2.Qc6#
      • 1...c6
        • 2.Re5#
        • 2.Qxc6#
        • 2.Qxd6#
      • 1...Kxc5!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Rxd4#
      • 1...Kxe4
        • 2.Sc5#
      • 1...Sc2
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...c5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(i);SBLOCK,XS(F)::QAB1(H),XP(j)
  • Tries
    • Try
      • R(B);XP(j)
      • Threat
        • QAB(H)+R(B),DCHECK
      • Refutation
        • K(g);P-FLIGHT,XS(F)
    • Try
      • R(I);XP(j)
      • Threat
        • QAB(H)+R(I),DCHECK
      • Refutation
        • K(g);P-FLIGHT,XS(F)
    • Try
      • Q(H);N_PINP(j),P_PINP(i)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);XB(D)::QAB1(H)
        • S(d);::QAB1(H)
        • S(h);::R1(B)
      • Refutation
        • K(g);N_SPINP(i),P-FLIGHT,XS(F)
  • Actual
    • S(F);XP(j)
    • Threat
      • R1(B),XP(f)
    • Vars
      • K(g);S_FLIGHT,XR(B)::R(I)+S(F),DCHECK
      • S(d);N_GUARD::QAR2(H)
      • S(d);N_GUARD::QAR2(H),XS(d)
      • P(l);SBLOCK::QAB(H)+S(F),DCHECK
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