MESON Chess Problem Database

Problem Display
PID: 235507 (1n6/2Q2K2/5p2/2pkp2N/5q2/1P1P1P2/N1P1R3/3r2b1 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Schach, 2007

1n6/2Q2K2/5p2/2pkp2N/5q2/1P1P1P2/N1P1R3/3r2b1

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd6#
    • 1...Qd4
      • 2.Sxf6#
    • 1...Bd4
      • 2.c4#
    • 1...Sa6
      • 2.Qd7#
    • 1...Sc6
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
  • Tries
    • 1.Sxf4+?
      • 1...Kd4
        • 2.Re4#
        • 2.Qd6#
        • 2.c3#
      • 1...exf4!
    • 1.Sxf6+?
      • 1...Kd4
        • 2.Qd6#
      • 1...Qxf6+!
    • 1.Re4?
      • threat
        • 2.Sc3#
        • 2.c4#
      • 1...Rxd3
        • 2.c4#
      • 1...Qc1
        • 2.Sc3#
        • 2.Sxf6#
      • 1...Qd2
        • 2.Sxf6#
        • 2.c4#
      • 1...Rc1
        • 2.Sc3#
      • 1...Bd4
        • 2.c4#
      • 1...c4
        • 2.Sc3#
        • 2.Sb4#
        • 2.bxc4#
        • 2.dxc4#
      • 1...Qxe4!
    • 1.Qd8+?
      • 1...Sd7
        • 2.Qxd7#
      • 1...Kc6!
    • 1.c4+?
      • 1...Kd4
        • 2.Qd6#
      • 1...Qxc4!
  • Keys
    • 1.d4!
      • threat
        • 2.Qxc5#
      • 1...Kxd4
        • 2.Qd6#
      • 1...Qxd4
        • 2.Sxf6#
      • 1...Rxd4
        • 2.Sc3#
      • 1...Bxd4
        • 2.c4#
      • 1...cxd4
        • 2.Sb4#
      • 1...exd4
        • 2.Sxf4#
      • 1...Sa6
        • 2.Qd7#
      • 1...Sc6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...c4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(e);P-FLIGHT::QAR2(H)
    • Q(c);N_GUARD,SBLOCK::S(G),XP(g)
    • B(b);SBLOCK,S_CUTQ(c)::P(B)
    • S(h);N_GUARD::QAR2(H)
    • S(h);N_GUARD::QAR2(H),XS(h)
  • Tries
    • Try
      • S(G);CHECK,XQ(c)
      • Refutation
        • P(f);XS(G)
    • Try
      • S(G);CHECK,P_SPINS(G),XP(g)
      • Vars
        • K(e);P-FLIGHT::QAR2(H)
      • Refutation
        • Q(c);CHECK,XS(G)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XP(E)::P(B)
        • R(a);::S(A)
        • B(b);::P(B)
      • Refutation
        • Q(c);XR(C)
    • Try
      • Q(H);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAR2(H),XS(h)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • P(B);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR2(H)
      • Refutation
        • Q(c);XP(B)
  • Actual
    • P(E);
    • Threat
      • QAR1(H),XP(d)
    • Vars
      • K(e);P-FLIGHT,XP(E)::QAR2(H)
      • Q(c);N_GUARD,SBLOCK,XP(E)::S(G),XP(g)
      • R(a);SBLOCK,XP(E)::S(A)
      • B(b);SBLOCK,XP(E)::P(B)
      • P(d);N_GUARD,SBLOCK,XP(E)::S(A)
      • P(f);N_GUARD,SBLOCK,XP(E)::S(G),XQ(c)
      • S(h);N_GUARD::QAR2(H)
      • S(h);N_GUARD::QAR2(H),XS(h)
      • P(d);::QAR1(H)
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