MESON Chess Problem Database

Problem Display
PID: 87898 (8/5B1K/N1p1R1PQ/1P1k1P2/n1p1p2p/4p3/2n1N1pq/8 w - - 0 1)

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Uralski Problemist, 1999

8/5B1K/N1p1R1PQ/1P1k1P2/n1p1p2p/4p3/2n1N1pq/8

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sf4+?
      • 1...Kd4
        • 2.Qg7#
      • 1...Qxf4!
    • 1.Qf4?
      • threat
        • 2.Rxe4#
        • 2.Rxc6#
        • 2.Rd6#
        • 2.Rf6#
        • 2.Re7#
        • 2.Re8#
        • 2.Qxe4#
      • 1...cxb5
        • 2.Rb6#
        • 2.Rd6#
        • 2.Rf6#
        • 2.Qxe4#
      • 1...Sd4
        • 2.Rd6#
        • 2.Qxe4#
      • 1...Sc3
        • 2.Rxe4#
        • 2.Rxc6#
        • 2.Rd6#
        • 2.Rf6#
        • 2.Re7#
        • 2.Re8#
      • 1...Sc5
        • 2.Sc7#
        • 2.Rd6#
      • 1...c5
        • 2.Sc7#
        • 2.Rxe4#
        • 2.Rb6#
        • 2.Rc6#
        • 2.Rd6#
        • 2.Rf6#
        • 2.Re7#
        • 2.Re8#
        • 2.Qxe4#
      • 1...Qxf4!
    • 1.Qg7?
      • threat
        • 2.Rxc6#
      • 1...cxb5
        • 2.Rb6#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qd6
        • 2.Re5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Sc3#
      • 1...c5
        • 2.Rb6#
        • 2.Rc6#
      • 1...Qc7!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Re8#
      • 1...cxb5
        • 2.Qa8#
      • 1...Qe5
        • 2.Rd6#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qc7
        • 2.Sxc7#
      • 1...Sd4
        • 2.Sb4#
      • 1...Sc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(i);P-FLIGHT::QAB(G)
      • Refutation
        • Q(c);XS(A)
    • Try
      • Q(G);
      • Threat
        • DUALS(7)
      • Refutation
        • Q(c);XQ(G)
    • Try
      • Q(G);
      • Threat
        • B(H)+R(E),XP(j)
      • Vars
        • P(j);OGATE,XP(B)::B(H)+R(E)
        • Q(c);N_GUARD::QAR1(G),XQ(c)
        • Q(c);SBLOCK::B(H)+R(E),DCHECK
        • S(a);N_GUARD::QAR1(G),XS(a)
        • S(e);N_GUARD::S(A)
      • Refutation
        • Q(c);
  • Actual
    • Q(G);
    • Threat
      • B(H)+R(E)
    • Vars
      • P(j);OGATEB,XP(B)::QAB(G)
      • Q(c);SBLOCK::B(H)+R(E),DCHECK
      • Q(c);N_GUARD::QAR1(G),XQ(c)
      • Q(c);N_GUARD,P_PINB(H)::S(D),XQ(c)
      • S(a);N_GUARD::S(D)
      • S(e);N_GUARD::QAR1(G),XS(e)
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