MESON Chess Problem Database

Problem Display
PID: 265297 (4Qn2/n3N1pB/R2Pqp1p/4kP2/2P1p3/4P3/K2N4/8 w - - 0 1)

Zamanov, Vidadi

1st HM., Polski Zwiazek Szachowy, 2015

(First published on Tue Jul 21 2015)

4Qn2/n3N1pB/R2Pqp1p/4kP2/2P1p3/4P3/K2N4/8

#2

10 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4+
      • 2.Sxc4#
    • 1...Qxf5
      • 2.Sg6#
    • 1...Qxd6
      • 2.Sc6#
  • Tries
    • 1.Sg6+?
      • 1...Sxg6
        • 2.Qxe6#
      • 1...Kxf5!
    • 1.Qb5+?
      • 1...Qd5
        • 2.Qxd5#
      • 1...Sxb5!
    • 1.Qc6?
      • threat
        • 2.Qxe4#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Qxf5
        • 2.Qd5#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Sxc6!
    • 1.Qg6?
      • threat
        • 2.Qg3#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Sxg6!
    • 1.Qa8?
      • threat
        • 2.Qxe4#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Qxf5
        • 2.Qd5#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Sc6!
    • 1.Qb8?
      • threat
        • 2.Qb2#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Qxf5
        • 2.d7#
      • 1...Qxd6
        • 2.Qxd6#
      • 1...Sb5
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Qd5!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qh2#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Sg6
        • 2.Sxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(c);CHECK,XP(D)::S(B),XQ(c)
    • Q(c);N_PINP(D),SBLOCK,XP(E)::QAR(J)+S(H),DCHECK
    • Q(c);N_PINP(D),SBLOCK,XP(G)::QAR(J)+S(H),DCHECK
  • Tries
    • Try
      • S(H);CHECK,P_PINQ(c)
      • Vars
        • S(h);XS(H)::QAR1(J),XQ(c)
      • Refutation
        • K(b);N_SPINQ(c),P-FLIGHT,XP(E)
    • Try
      • Q(J);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAR1(J),XQ(c)
      • Refutation
        • S(f);XQ(J)
    • Try
      • Q(J);
      • Threat
        • QAR1(J),XP(a)
      • Vars
        • Q(c);CHECK,XP(D)::S(B),XQ(c)
        • Q(c);N_GUARD,N_PINP(D),XP(E)::QAR1(J)
        • Q(c);N_GUARD::QAR1(J),XQ(c)
      • Refutation
        • S(f);XQ(J)
    • Try
      • Q(J);
      • Threat
        • QAB(J)
      • Vars
        • Q(c);CHECK,XP(D)::S(B),XQ(c)
        • Q(c);N_PINP(D),OGATE,XP(E)::QAR1(J),XQ(c)
      • Refutation
        • S(h);XQ(J)
    • Try
      • Q(J);
      • Threat
        • QAR1(J),XP(a)
      • Vars
        • Q(c);CHECK,XP(D)::S(B),XQ(c)
        • Q(c);N_GUARD,N_PINP(D),XP(E)::QAR1(J)
        • Q(c);N_GUARD::QAR1(J),XQ(c)
      • Refutation
        • S(f);
    • Try
      • Q(J);
      • Threat
        • QAB(J)
      • Vars
        • Q(c);CHECK,XP(D)::S(B),XQ(c)
        • Q(c);N_GUARD,N_PINP(D),XP(E)::QAB(J)+P(G)
        • Q(c);N_PINP(D),OGATE,P_SPINQ(c),XP(G)::QAB1(J),XQ(c)
        • S(f);N_GUARD::S(H)
        • S(f);N_GUARD::S(H),XS(f)
      • Refutation
        • Q(c);
  • Actual
    • Q(J);
    • Threat
      • QAB(J)
    • Vars
      • Q(c);CHECK,XP(D)::S(B),XQ(c)
      • Q(c);N_PINP(D),OGATE,P_SPINQ(c),XP(E)::QAR1(J),XQ(c)
      • S(h);N_GUARD::S(H),XS(h)
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