MESON Chess Problem Database

Problem Display
PID: 180744 (6K1/4p3/8/p1PR1P2/2N1kn2/2pR2Pp/2pp1B2/1Q6 w - - 0 1)

Zhuravlev, Andrey Nikolaevich

3rd Prize, Birnov MT, 2013

6K1/4p3/8/p1PR1P2/2N1kn2/2pR2Pp/2pp1B2/1Q6

#2

9 + 8

23 Die Schwalbe 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qh1#
    • 1...Sxd3
      • 2.Qh1#
    • 1...Sh5
      • 2.Qh1#
    • 1...Se6
      • 2.Qh1#
    • 1...Sg6
      • 2.Qh1#
    • 1...c1Q
      • 2.Re5#
    • 1...c1S
      • 2.Re5#
    • 1...c1B
      • 2.Re5#
    • 1...c1R
      • 2.Re5#
    • 1...e5
      • 2.Sd6#
    • 1...e6
      • 2.Sd6#
  • Tries
    • 1.Qxc2?
      • threat
        • 2.Re5#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Sxd5
        • 2.Rxc3#
      • 1...e5
        • 2.Sd6#
        • 2.Rxe5#
      • 1...Sg6!
    • 1.Qf1?
      • threat
        • 2.Re5#
      • 1...Sxd3
        • 2.Qxd3#
        • 2.Qh1#
      • 1...e5
        • 2.Sd6#
        • 2.Rxe5#
      • 1...Se2
        • 2.Qxe2#
        • 2.Qh1#
      • 1...Sg6
        • 2.Qe2#
        • 2.Qh1#
      • 1...Sxd5!
    • 1.Qb7?
      • threat
        • 2.Re3#
      • 1...Sxd3
        • 2.Re5#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...e5
        • 2.Sd6#
      • 1...Sg2
        • 2.Qxe7#
      • 1...d1S!
  • Keys
    • 1.Rxc3!
      • threat
        • 2.Re5#
      • 1...Kxd5
        • 2.Qb7#
      • 1...Sxd5
        • 2.Qxc2#
      • 1...Sd3
        • 2.Qh1#
      • 1...e5
        • 2.Rxe5#
      • 1...Sg6
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • S(f);N_GUARD::QAB(A)
    • S(f);N_GUARD,XR(C)::QAB(A)
    • P(a);::R1(G)
    • P(h);N_GUARD::S(E)
  • Tries
    • Try
      • Q(A);XP(a)
      • Threat
        • R1(G)
      • Vars
        • S(f);OGATE,P_SPINS(f),XR(C)::QAB1(A),XS(f)
        • S(f);N_GUARD,SBLOCK,XR(G)::QAB(A)+R(C),XP(c)
      • Refutation
        • S(f);
    • Try
      • Q(A);
      • Threat
        • R1(G)
      • Refutation
        • S(f);XR(G)
    • Try
      • Q(A);
      • Threat
        • R1(C)
      • Vars
        • S(f);SBLOCK,XR(C)::QAB(A)+R(G),DCHECK
        • S(f);OGATE,P_SPINS(f),XR(G)::QAB1(A),XS(f)
        • P(h);N_GUARD::S(E)
        • S(f);N_GUARD::QAR(A),XP(h)
      • Refutation
        • P(b);
  • Actual
    • R(C);P_PINP(a),XP(c)
    • Threat
      • R1(G)
    • Vars
      • K(e);N_SPINP(a),OGATEB,S_FLIGHT,XR(G)::QAB(A)
      • S(f);N_GUARD,SBLOCK,XR(G)::QAB(A),XP(a)
      • S(f);N_GUARD,N_SPINP(a)::QAB(A)
      • P(h);::R1(G),XP(h)
      • S(f);N_GUARD::QAB(A)
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