MESON Chess Problem Database

Problem Display
PID: 255934 (4BbNQ/4p3/q1p3p1/2R2PkN/p6n/3P1ppK/7B/5nR1 w - - 0 1)

Tyunin, Aleksandr Dmitrevich

Zadachi i Etyudi, 2007

4BbNQ/4p3/q1p3p1/2R2PkN/p6n/3P1ppK/7B/5nR1

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bh6
      • 2.Qxh6#
    • 1...Sd2
      • 2.Rxg3#
    • 1...g2
      • 2.Bf4#
  • Tries
    • 1.Sg7?
      • threat
        • 2.Se6#
        • 2.Qxh4#
        • 2.Qh6#
      • 1...Bxg7
        • 2.Qxh4#
      • 1...Sxf5
        • 2.Se6#
        • 2.Qh4#
        • 2.Qh6#
      • 1...Qc4
        • 2.Qh6#
      • 1...Qc8
        • 2.Qxh4#
        • 2.Qh6#
      • 1...Sg2
        • 2.Se6#
        • 2.Qh6#
      • 1...e5
        • 2.Qxh4#
        • 2.Qh6#
      • 1...e6
        • 2.Sxe6#
        • 2.Qxh4#
        • 2.Qh6#
      • 1...Kf4!
    • 1.Bxg3?
      • threat
        • 2.Bf4#
        • 2.Bxh4#
      • 1...Sxg3
        • 2.Rxg3#
      • 1...Sxf5
        • 2.Bf4#
        • 2.Bh4#
      • 1...gxh5
        • 2.Qxh5#
      • 1...Bh6
        • 2.Qxh6#
      • 1...Sg2
        • 2.Bf4#
        • 2.Bh4#
      • 1...e5!
    • 1.Qd4?
      • threat
        • 2.Qg4#
        • 2.Qxh4#
      • 1...Kxh5
        • 2.Qg4#
        • 2.Qxh4#
      • 1...Sxh2
        • 2.Qxh4#
      • 1...Sxf5
        • 2.Qg4#
        • 2.Qh4#
      • 1...gxh5
        • 2.Qxh4#
      • 1...e5
        • 2.Qg4#
      • 1...Se3
        • 2.Qxh4#
      • 1...Sg2
        • 2.Qg4#
      • 1...Qc4!
    • 1.Qf6+?
      • 1...Kxh5
        • 2.Qxh4#
      • 1...exf6!
  • Keys
    • 1.Sxg3!
      • threat
        • 2.Se4#
        • 2.Qxh4#
      • 1...Kf4
        • 2.Sxf1#
      • 1...Sxh2
        • 2.Qxh4#
      • 1...Sxg3
        • 2.Qxh4#
      • 1...Sxf5
        • 2.Sxf1#
        • 2.Se4#
        • 2.Qh4#
      • 1...Qc4
        • 2.Se4#
      • 1...Bh6
        • 2.Qxh6#
      • 1...Sg2
        • 2.Se4#
      • 1...e5
        • 2.Qxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(k);N_GUARD::QAB1(J),XB(k)
    • S(a);N_GUARD::R(A),XP(c)
    • P(c);OGATE::B(B)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(3)
      • Vars
        • B(k);XS(G)::QAB1(J),XS(e)
        • Q(g);::QAB1(J)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • B(B);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);OGATE,P_SPINS(a),XB(B)::R(A),XS(a)
        • P(i);OGATE,XS(G)::QAR1(J),XP(i)
        • B(k);N_GUARD::QAB1(J),XB(k)
      • Refutation
        • P(j);
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XB(B)::QAB1(J),XS(e)
        • P(i);XS(G)::QAB1(J),XS(e)
        • P(j);::QAR1(J)
        • S(a);::QAB1(J),XS(e)
        • S(e);N_SPINP(c)::QAR1(J)
      • Refutation
        • Q(g);
    • Try
      • Q(J);CHECK
      • Vars
        • K(f);N_SPINP(c),OGATE,P-FLIGHT,P_SPINP(i),XS(G)::QAR1(J),XS(e)
      • Refutation
        • P(j);XQ(J)
  • Actual
    • S(G);XP(c)
    • Threat
      • DUALS(2)
    • Vars
      • K(f);S_CUTS(e),S_FLIGHT::B(B)+S(G),XS(a)
      • S(a);XB(B)::QAB1(J),XS(e)
      • S(a);P_SPINS(a),XS(G)::QAB1(J),XS(e)
      • Q(g);::R(A)+S(G),DCHECK
      • B(k);N_GUARD::QAB1(J),XB(k)
      • S(e);::S(G)
      • P(j);::QAB1(J),XS(e)
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