MESON Chess Problem Database

Problem Display
PID: 132231 (B6B/3p4/1KnP1R2/2PN2p1/1pPPk1p1/1Rbp3b/3p4/1N1n2Q1 w - - 0 1)

Stojnic, Dragan

Comm., StrateGems, 2008

B6B/3p4/1KnP1R2/2PN2p1/1pPPk1p1/1Rbp3b/3p4/1N1n2Q1

#2

12 + 11

145 StrateGems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Sxd2#
    • 1...Bb2
      • 2.Sxd2#
    • 1...Bf1
      • 2.Qxg4#
    • 1...Sb2
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sa5
      • 2.Sdxc3#
    • 1...Se5
      • 2.Sdxc3#
    • 1...Sa7
      • 2.Sdxc3#
    • 1...Se7
      • 2.Sdxc3#
      • 2.Sxe7#
    • 1...Sb8
      • 2.Sdxc3#
    • 1...Sd8
      • 2.Sdxc3#
  • Tries
    • 1.Sbxc3+?
      • 1...Sxc3
        • 2.Qe3#
      • 1...bxc3!
    • 1.Sdxc3+?
      • 1...Sxc3
        • 2.Sxd2#
      • 1...bxc3!
    • 1.Rf1?
      • threat
        • 2.Sf6#
      • 1...Bxd4
        • 2.Sxd2#
      • 1...Bxf1
        • 2.Qxg4#
      • 1...Sxd4
        • 2.Sdxc3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sf2!
    • 1.Qh1+?
      • 1...Kxd4
        • 2.Rf4#
      • 1...Bg2!
    • 1.Qg2+?
      • 1...Kxd4
        • 2.Rf4#
      • 1...Bxg2!
  • Keys
    • 1.Qg3!
      • 1...Kxd4
        • 2.Rf4#
      • 1...Bxd4
        • 2.Sxd2#
      • 1...Sxd4
        • 2.Sdxc3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Ba1
        • 2.Qxd3#
      • 1...Bb2
        • 2.Qxd3#
      • 1...Bf1
        • 2.Qxg4#
      • 1...Bg2
        • 2.Qxg4#
      • 1...Sb2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sa5
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sa7
        • 2.Qe5#
      • 1...Se7
        • 2.Qe5#
      • 1...Sb8
        • 2.Qe5#
      • 1...Sd8
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 7
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD::S(A),XP(b)
    • B(e);N_GUARD::QAR2(B),XP(h)
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
    • S(j);::B(K)+S(G),DCHECK,XB(c)
  • Tries
    • Try
      • S(A);CHECK,XB(c)
      • Vars
        • S(a);XS(A)::QAR1(B)
      • Refutation
        • P(f);XS(A)
    • Try
      • S(G);CHECK,P_PINS(j),XB(c)
      • Vars
        • S(a);XS(G)::S(A),XP(b)
      • Refutation
        • P(f);XS(G)
    • Try
      • R(J);
      • Threat
        • S(G)
      • Vars
        • B(c);N_GUARD,P_PINP(F),XP(E)::S(A),XP(b)
        • B(e);N_GUARD,XR(J)::QAR2(B),XP(h)
        • S(j);XP(E)::B(K)+S(G),DCHECK,XB(c)
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(B);CHECK
      • Vars
        • K(g);P-FLIGHT,XP(E)::B(L)+R(J),DCHECK
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • Q(B);CHECK
      • Vars
        • K(g);P-FLIGHT,XP(E)::B(L)+R(J),DCHECK
      • Refutation
        • B(e);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(g);P-FLIGHT,XP(E)::B(L)+R(J),DCHECK
      • B(c);N_GUARD,P_PINP(F),SBLOCK,XP(E)::S(A),XP(b)
      • S(j);SBLOCK,XP(E)::B(K)+S(G),DCHECK,XB(c)
      • S(a);N_GUARD::QAR1(B)
      • B(c);::QAB1(B),XP(d)
      • B(e);N_GUARD::QAR2(B),XP(h)
      • S(a);N_GUARD::QAR1(B),XS(a)
      • S(j);N_GUARD::QAR1(B)
      • S(j);N_GUARD::QAR1(B),XS(j)
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