MESON Chess Problem Database

Problem Display
PID: 166644 (BB1R4/1N6/4Pp2/2PPPN1R/1n2krpQ/2P1P3/2P1Kp2/5n2 w - - 0 1)

Onkoud, Abdelaziz

Comm., StrateGems, 2016

BB1R4/1N6/4Pp2/2PPPN1R/1n2krpQ/2P1P3/2P1Kp2/5n2

#2

15 + 7

145 StrateGems 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Sg3#
    • 1...Sh2
      • 2.Sg3#
    • 1...Sxe3
      • 2.Sg3#
    • 1...Sg3+
      • 2.Sxg3#
    • 1...Sd3
      • 2.cxd3#
    • 1...Sxd5
      • 2.Sfd6#
    • 1...g3
      • 2.Qxf4#
    • 1...fxe5
      • 2.Sbd6#
  • Tries
    • 1.Qxf6?
      • threat
        • 2.Sbd6#
      • 1...Sg3+
        • 2.Sxg3#
      • 1...Sc6!
    • 1.Qh2?
      • threat
        • 2.Qxf4#
      • 1...Sg3+
        • 2.Sxg3#
      • 1...Rxf5
        • 2.Sd6#
      • 1...Sxh2
        • 2.Sg3#
      • 1...Sxe3
        • 2.Sg3#
      • 1...Sxd5
        • 2.Sfd6#
      • 1...fxe5
        • 2.Sbd6#
      • 1...Rf3
        • 2.Sbd6#
      • 1...Sd3
        • 2.cxd3#
      • 1...g3!
    • 1.Qxg4?
      • threat
        • 2.Qxf4#
      • 1...Sg3+
        • 2.Sxg3#
      • 1...Sxe3
        • 2.Sg3#
      • 1...Sxd5
        • 2.Sfd6#
      • 1...fxe5
        • 2.Sbd6#
      • 1...Sd3
        • 2.cxd3#
      • 1...Rxg4!
    • 1.c6?
      • threat
        • 2.Sc5#
      • 1...Sg3+
        • 2.Sxg3#
      • 1...Sd3
        • 2.cxd3#
      • 1...Sa6!
    • 1.exf6?
      • threat
        • 2.Sfd6#
      • 1...Sg3+
        • 2.Sxg3#
      • 1...Rxf5!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qxf4#
      • 1...Sxg3+
        • 2.Sxg3#
      • 1...Rxf5
        • 2.Sd6#
      • 1...Sxe3
        • 2.Qxe3#
      • 1...Sxd5
        • 2.Sfd6#
      • 1...fxe5
        • 2.Sbd6#
      • 1...Rf3
        • 2.Sbd6#
      • 1...Sd3
        • 2.cxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::S(I)
    • S(a);N_GUARD,XP(D)::S(I)
    • S(a);CHECK,N_GUARD::S(I),XS(a)
    • S(c);OGATE::P(A),XS(c)
    • S(c);SBLOCK,XP(G)::S(I)
    • P(f);OGATE,P_SPINR(e)::QAR1(E),XR(e)
    • P(g);SBLOCK,XP(H)::S(L)
  • Tries
    • Try
      • Q(E);XP(g)
      • Threat
        • S(L)
      • Vars
        • S(a);CHECK,N_GUARD::S(I),XS(a)
      • Refutation
        • S(c);
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XR(e)
      • Vars
        • S(a);CHECK,N_GUARD::S(I),XS(a)
        • R(e);XS(I)::S(L)
        • S(a);N_GUARD,XQ(E)::S(I)
        • S(a);N_GUARD,XP(D)::S(I)
        • S(c);SBLOCK,XP(G)::S(I)
        • P(g);SBLOCK,XP(H)::S(L)
        • R(e);::S(L)
        • S(c);OGATE::P(A),XS(c)
      • Refutation
        • P(f);
    • Try
      • Q(E);P_PINR(e),XP(f)
      • Threat
        • QAR1(E),XR(e)
      • Vars
        • S(a);CHECK,N_GUARD::S(I),XS(a)
        • S(a);N_GUARD,XP(D)::S(I)
        • S(c);SBLOCK,XP(G)::S(I)
        • P(g);SBLOCK,XP(H)::S(L)
        • S(c);OGATE::P(A),XS(c)
      • Refutation
        • R(e);N_SPINR(e),XQ(E)
    • Try
      • P(F);
      • Threat
        • S(L)
      • Vars
        • S(a);CHECK,N_GUARD::S(I),XS(a)
        • S(c);OGATE::P(A),XS(c)
      • Refutation
        • S(c);
    • Try
      • P(H);XP(g)
      • Threat
        • S(I)
      • Vars
        • S(a);CHECK,N_GUARD::S(I),XS(a)
      • Refutation
        • R(e);P_SPINP(f),XS(I)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XR(e)
    • Vars
      • S(a);CHECK,XQ(E)::S(I),XS(a)
      • R(e);XS(I)::S(L)
      • S(a);OGATE,XP(D)::QAR1(E),XS(a)
      • S(c);SBLOCK,XP(G)::S(I)
      • P(g);SBLOCK,XP(H)::S(L)
      • R(e);::S(L)
      • S(c);OGATE::P(A),XS(c)
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