MESON Chess Problem Database

Problem Display
PID: 260915 (r2B2bK/2N1p2n/5R2/2P1k3/8/p4P1N/3PP3/5nQ1 w - - 0 1)

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Neue Zurcher Zeitung, 2011

r2B2bK/2N1p2n/5R2/2P1k3/8/p4P1N/3PP3/5nQ1

#2

10 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd2
      • 2.Qa1#
    • 1...Sh2
      • 2.Qa1#
    • 1...Se3
      • 2.Qa1#
    • 1...Sg3
      • 2.Qa1#
    • 1...e6
      • 2.d4#
  • Tries
    • 1.Re6+?
      • 1...Kf5
        • 2.Qg4#
        • 2.Qg6#
        • 2.e4#
      • 1...Bxe6!
    • 1.Qg4?
      • threat
        • 2.Rf5#
        • 2.Qf4#
      • 1...Sxf6
        • 2.Qf4#
        • 2.d4#
      • 1...exf6
        • 2.Qe4#
        • 2.Qf4#
        • 2.d4#
      • 1...Ra4
        • 2.Rf5#
      • 1...Be6
        • 2.Rxe6#
        • 2.Qf4#
      • 1...Se3
        • 2.Qf4#
      • 1...Sg3
        • 2.Qf4#
      • 1...e6
        • 2.Qe4#
        • 2.Qf4#
        • 2.d4#
      • 1...Kxf6!
    • 1.Qg5+?
      • 1...Kd4
        • 2.Rf4#
      • 1...Sxg5!
    • 1.f4+?
      • 1...Ke4
        • 2.d3#
      • 1...Kxf6!
  • Keys
    • 1.e4!
      • threat
        • 2.Rf5#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Sxf6
        • 2.d4#
      • 1...exf6
        • 2.d4#
      • 1...Se3
        • 2.Qa1#
      • 1...Be6
        • 2.Rxe6#
      • 1...Sg3
        • 2.Qa1#
      • 1...e6
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(a);OGATE,XP(B)::QAB(A)
    • S(a);OGATE::QAB(A)
    • P(d);::P(B)
  • Tries
    • Try
      • R(G);CHECK
      • Refutation
        • B(g);P_PINB(I),XR(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);::R1(G)
        • S(a);::QAB1(A)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT,XR(G)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_CUTS(e),S_FLIGHT::R(G)
      • Refutation
        • S(e);XQ(A)
    • Try
      • P(D);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT::P(B)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT,XR(G)
  • Actual
    • P(C);
    • Threat
      • R1(G)
    • Vars
      • K(c);OGATEB,P_SPINP(d),S_FLIGHT,XR(G)::QAB1(A)
      • S(e);SBLOCK,XR(G)::P(B)
      • P(d);XR(G)::P(B)
      • S(a);OGATE::QAB(A)
      • B(g);N_GUARD,P_PINB(I)::R1(G),XB(g)
      • P(d);::P(B)
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