MESON Chess Problem Database

Problem Display
PID: 103577 (8/1p5N/b3r3/2R1Pk2/p1P2N2/4pQ2/1pKpPpn1/1Bbnq3 w - - 0 1)

Herland, Sigmund

La Strategie, 1910

8/1p5N/b3r3/2R1Pk2/p1P2N2/4pQ2/1pKpPpn1/1Bbnq3

#2

9 + 13

16336 Problemes choisis composes par Sigmund Herland (Yaremska-Iliescu) 2001
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.e6#
    • 1...Rd6
      • 2.exd6#
    • 1...Rf6
      • 2.exf6#
      • 2.e6#
    • 1...Rg6
      • 2.e6#
    • 1...Rh6
      • 2.e6#
    • 1...Re7
      • 2.e6#
    • 1...Re8
      • 2.e6#
    • 1...Sc3
      • 2.Kxc3#
    • 1...a3
      • 2.Kb3#
  • Tries
    • 1.Sg6+?
      • 1...Sf4
        • 2.Sh4#
      • 1...Kxg6!
    • 1.Qg4+?
      • 1...Ke4
        • 2.Sxg2#
      • 1...Kxg4!
    • 1.Qh5+?
      • 1...Kxf4
        • 2.Qf3#
      • 1...Ke4!
    • 1.Qh3+?
      • 1...Kxf4
        • 2.Qf3#
      • 1...Ke4!
  • Keys
    • 1.Kd3!
      • threat
        • 2.Kd4#
      • 1...Qxe2+
        • 2.Kxe2#
      • 1...Rd6+
        • 2.exd6#
      • 1...Bxc4+
        • 2.Kxc4#
      • 1...Sc3
        • 2.Kxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(l);OGATE::R(G)+P(H)
    • R(l);OGATE::R(G)+P(H),XR(l)
    • S(b);::B(A)+K(B),XS(b)
    • P(i);::B(A)+K(B)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • S(g);P_SPINS(g)::S(F)
      • Refutation
        • K(j);S_FLIGHT,XS(F)
    • Try
      • Q(D);CHECK
      • Vars
        • K(j);S_FLIGHT::QAR(D)+S(F),XS(g)
      • Refutation
        • K(j);S_FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(j);OGATEB,P-FLIGHT,XS(F)::QAR1(D)
      • Refutation
        • K(j);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(j);OGATEB,P-FLIGHT,XS(F)::QAR1(D)
      • Refutation
        • K(j);S_FLIGHT
  • Actual
    • K(B);P_SPINP(E),S_FLIGHT
    • Threat
      • B(A)+K(B)
    • Vars
      • Q(c);CHECK,XP(C)::B(A)+K(B),XQ(c)
      • R(l);CHECK,OGATE::R(G)+P(H),XR(l)
      • B(k);CHECK,XP(E)::B(A)+K(B),XB(k)
      • S(b);::B(A)+K(B),XS(b)
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