MESON Chess Problem Database

Problem Display
PID: 263462 (3N4/q3p2B/r1PpP3/3kPNK1/p2Pp3/2R1R3/1Q6/2n5 w - - 0 1)

Sukhodolov, Nikolai

Zadachi i Etyudi, 2009

3N4/q3p2B/r1PpP3/3kPNK1/p2Pp3/2R1R3/1Q6/2n5

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7
      • 2.Qb5#
    • 1...Qd7
      • 2.Qb5#
    • 1...Qa8
      • 2.Qb5#
    • 1...Sa2
      • 2.Qxa2#
    • 1...Se2
      • 2.Qa2#
    • 1...Sd3
      • 2.Qa2#
  • Tries
    • 1.Sxe7+?
      • 1...Kxd4
        • 2.Rxe4#
      • 1...Qxe7+!
    • 1.Red3?
      • threat
        • 2.Se3#
      • 1...Qxd4
        • 2.Qb5#
      • 1...Sxd3
        • 2.Qa2#
      • 1...exd3
        • 2.Qg2#
      • 1...e3
        • 2.Sxe3#
        • 2.Qg2#
      • 1...dxe5!
    • 1.Qb1?
      • threat
        • 2.Qxe4#
      • 1...Sd3
        • 2.Qa2#
      • 1...Qxd4!
    • 1.Qc2?
      • threat
        • 2.Qxe4#
      • 1...Sd3
        • 2.Qa2#
      • 1...Qxd4!
    • 1.Qb4?
      • threat
        • 2.Qc4#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Qc5
        • 2.Sxe7#
      • 1...Rxc6!
  • Keys
    • 1.Rxe4!
      • threat
        • 2.Se3#
      • 1...Kxe4
        • 2.Qg2#
      • 1...Qxd4
        • 2.Sxe7#
      • 1...dxe5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(g);N_GUARD::QAR2(A)
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);N_GUARD::QAB(A)
  • Tries
    • Try
      • S(F);CHECK,XP(h)
      • Vars
        • K(d);P-FLIGHT,S_CUTQ(g),XP(D)::R1(C),XP(c)
      • Refutation
        • Q(g);CHECK,XS(F)
    • Try
      • R(C);
      • Threat
        • S(F)
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g),XP(D)::QAR2(A)
        • S(a);N_GUARD,XR(C)::QAB(A)
        • P(c);OGATEB,XR(C)::QAB(A)
      • Refutation
        • P(f);XP(E)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • S(a);N_GUARD::QAB(A)
      • Refutation
        • Q(g);XP(D)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • S(a);N_GUARD::QAB(A)
      • Refutation
        • Q(g);XP(D)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • Q(g);OGATE,XP(D)::QAR1(A),XQ(g)
        • Q(g);N_GUARD::S(F),XP(h)
      • Refutation
        • R(e);XP(H)
  • Actual
    • R(C);XP(c)
    • Threat
      • S(F)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(C)::QAB(A)
      • Q(g);N_GUARD,XP(D)::S(F),XP(h)
      • P(f);OGATE,XP(E)::R1(C),XP(f)
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