MESON Chess Problem Database

Problem Display
PID: 81303 (5Q1b/7K/4P2n/1RPp2N1/2Pk2r1/p5p1/q1pBPR2/5r2 w - - 0 1)

Pituk, Alexander

4th HM., Moment, 1999

5Q1b/7K/4P2n/1RPp2N1/2Pk2r1/p5p1/q1pBPR2/5r2

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Rb4#
    • 1...Ke5
      • 2.Qxh8#
    • 1...Qxc4
      • 2.Qxh8#
    • 1...Rf4
      • 2.Qxf4#
    • 1...Rxg5
      • 2.Qf4#
    • 1...dxc4
      • 2.Qd6#
  • Tries
    • 1.Sf3+?
      • 1...Kxc4
        • 2.Rb4#
      • 1...Ke4!
    • 1.Qd6?
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Rb4#
      • 1...Rxg5
        • 2.Qf4#
      • 1...Qxc4!
    • 1.Qf5?
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Qd3#
      • 1...Qxc4
        • 2.Sf3#
        • 2.e3#
      • 1...Rxg5
        • 2.Qf4#
      • 1...dxc4
        • 2.Sf3#
        • 2.e3#
      • 1...Be5
        • 2.Qd3#
      • 1...Sxf5!
    • 1.Qa8?
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Qa4#
      • 1...Ke5
        • 2.Qxd5#
        • 2.Qxh8#
      • 1...Qxc4
        • 2.Qxh8#
      • 1...dxc4
        • 2.Sf3#
      • 1...Rxg5!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxd5#
        • 2.Qc3#
      • 1...Kxc4
        • 2.Qd3#
      • 1...Ke5
        • 2.Qxd5#
      • 1...Qxc4
        • 2.Qe3#
      • 1...Rxg5
        • 2.Qf4#
      • 1...dxc4
        • 2.Bc3#
      • 1...c1Q
        • 2.Qxd5#
      • 1...c1R
        • 2.Qxd5#
      • 1...Qb3
        • 2.Qxd5#
      • 1...Qa1
        • 2.Qxd5#
      • 1...Qb2
        • 2.Qxd5#
      • 1...Re4
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(f);OGATEB,P-FLIGHT,XP(D)::R1(E)
    • K(f);S_FLIGHT::QAB(J),XB(j)
    • Q(b);SBLOCK,XP(D)::QAB(J),XB(j)
    • R(g);N_GUARD::QAR2(J),XR(g)
    • R(g);N_GUARD,XS(G)::QAR2(J)
    • P(h);OGATEB,SBLOCK,XP(D)::QAR2(J)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(f);P-FLIGHT,XP(D)::R1(E)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(J);P_PINP(h)
      • Threat
        • QAR1(J),XP(h)
      • Vars
        • K(f);N_SPINP(h),OGATEB,P-FLIGHT,XP(D)::R1(E)
        • R(g);N_GUARD,XS(G)::QAR2(J)
      • Refutation
        • Q(b);XP(D)
    • Try
      • Q(J);
      • Threat
        • QAR1(J),XP(h)
      • Vars
        • K(f);P-FLIGHT,XP(D)::QAB1(J)
        • R(g);N_GUARD,XS(G)::QAR2(J)
        • B(j);SBLOCK::QAR1(J)
      • Refutation
        • S(i);XQ(J)
    • Try
      • Q(J);
      • Threat
        • QAR1(J),XP(h)
      • Vars
        • K(f);OGATEB,P-FLIGHT,XP(D)::QAR2(J)
        • Q(b);SBLOCK,XP(D)::QAB(J),XB(j)
        • P(h);SBLOCK,XP(D)::S(G)
      • Refutation
        • R(g);XS(G)
  • Actual
    • Q(J);
    • Threat
      • DUALS(2)
    • Vars
      • K(f);P-FLIGHT,XP(D)::QAB1(J)
      • K(f);S_FLIGHT::QAR1(J),XP(h)
      • Q(b);SBLOCK,XP(D)::QAB1(J)
      • R(g);N_GUARD,XS(G)::QAR2(J)
      • P(h);SBLOCK,XP(D)::B(A)
      • P(c);::QAR1(J),XP(h)
      • Q(b);::QAR1(J),XP(h)
      • R(g);::QAB1(J)
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