MESON Chess Problem Database

Problem Display
PID: 229313 (5r2/4p1Q1/5q2/PR3p1r/1KNk1p2/PBpPp3/1R6/4N1n1 w - - 0 1)

Novitski, Petr Adrinovich

Tkachenko, Sergiy Ivanovich

The Macedonian Problemist, 2020

5r2/4p1Q1/5q2/PR3p1r/1KNk1p2/PBpPp3/1R6/4N1n1

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qxe5#
    • 1...e2
      • 2.Qxg1#
    • 1...e6
      • 2.Qa7#
      • 2.Qd7#
  • Tries
    • 1.Se5?
      • threat
        • 2.Sc2#
        • 2.Sc6#
        • 2.Rd5#
      • 1...Qxe5
        • 2.Rd5#
        • 2.Qxe5#
      • 1...e2
        • 2.Sc2#
        • 2.Qxg1#
      • 1...Qb6
        • 2.Sc2#
        • 2.S5f3#
        • 2.Sc6#
      • 1...Qc6
        • 2.Sc2#
        • 2.S5f3#
        • 2.Sxc6#
      • 1...Qe6
        • 2.Sc2#
        • 2.S5f3#
        • 2.Sc6#
      • 1...Qf7
        • 2.Sc2#
        • 2.S5f3#
        • 2.Sc6#
      • 1...Rh2
        • 2.Sc6#
        • 2.Rd5#
      • 1...Rb8
        • 2.Sc2#
        • 2.Sc6#
      • 1...Rc8
        • 2.Sc2#
        • 2.Rd5#
      • 1...Rd8
        • 2.Sc2#
        • 2.Sc6#
      • 1...c2
        • 2.Sxc2#
        • 2.Sc6#
        • 2.Rd5#
      • 1...e6
        • 2.Sc2#
        • 2.Sc6#
        • 2.Qa7#
        • 2.Qd7#
      • 1...Qd6+!
    • 1.Sb6?
      • threat
        • 2.Rd5#
      • 1...e2
        • 2.Qxg1#
      • 1...e6
        • 2.Qd7#
      • 1...Rd8!
    • 1.Sd6?
      • threat
        • 2.Rd5#
      • 1...e2
        • 2.Qxg1#
      • 1...e6
        • 2.Qa7#
      • 1...Rb8!
    • 1.Rd2?
      • threat
        • 2.Sc2#
      • 1...exd2
        • 2.Qxg1#
      • 1...c2
        • 2.Sxc2#
      • 1...cxd2!
    • 1.Qxe7?
      • threat
        • 2.Qc5#
      • 1...Qd6+
        • 2.Qxd6#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qb6
        • 2.Qe5#
      • 1...Qc6
        • 2.Qe5#
      • 1...Rc8
        • 2.Qxf6#
      • 1...Qxe7+!
  • Keys
    • 1.Sxe3!
      • threat
        • 2.S3c2#
      • 1...Kxe3
        • 2.Qxg1#
      • 1...fxe3
        • 2.Rd5#
      • 1...Rh2
        • 2.Sxf5#
      • 1...c2
        • 2.S3xc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(h);OGATE::QAB1(J),XQ(h)
    • P(c);OGATEB::QAB(J),XS(a)
  • Tries
    • Try
      • S(G);N_PINQ(h)
      • Threat
        • DUALS(3)
      • Refutation
        • Q(h);CHECK
    • Try
      • S(G);
      • Threat
        • R1(I)
      • Vars
        • P(c);OGATEB::QAB(J),XS(a)
        • P(i);OGATE::QAR(J)
      • Refutation
        • R(j);
    • Try
      • S(G);
      • Threat
        • R1(I)
      • Vars
        • P(c);OGATEB::QAB(J),XS(a)
        • P(i);OGATE::QAB(J)
      • Refutation
        • R(j);P_PINR(I)
    • Try
      • R(B);
      • Threat
        • S(A)
      • Vars
        • P(c);OGATEB,XR(B)::QAB(J),XS(a)
        • P(b);::S(A),XP(b)
      • Refutation
        • P(b);XR(B)
    • Try
      • Q(J);N_PINQ(h),XP(i)
      • Threat
        • QAB1(J)
      • Vars
        • Q(h);CHECK,N_GUARD::QAR2(J),XQ(h)
        • Q(h);N_GUARD::QAB1(J),XQ(h)
        • Q(h);N_GUARD,P_PINR(I)::QAB1(J)
        • Q(h);N_GUARD::QAB1(J)
        • R(j);N_GUARD::QAB(J),XQ(h)
      • Refutation
        • Q(h);CHECK,XQ(J)
  • Actual
    • S(G);XP(c)
    • Threat
      • S(G)
    • Vars
      • K(d);N_SPINQ(h),OGATEB,S_FLIGHT,XS(G)::QAB(J),XS(a)
      • P(e);SBLOCK,XS(G)::R1(I)
      • R(g);N_GUARD::S(G),XP(f)
      • P(b);::S(G),XP(b)
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