MESON Chess Problem Database

Problem Display
PID: 245925 (N1Kn4/Bp3Q2/2p1n3/4R1pp/2k3bR/P7/2PP4/Nq6 w - - 0 1)

Kopyl, Valery Volodimirovich

3rd HM., Sachsische Zeitung, 2009

N1Kn4/Bp3Q2/2p1n3/4R1pp/2k3bR/P7/2PP4/Nq6

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Qf1#
    • 1...Qf1
      • 2.Qxf1#
    • 1...Qb2
      • 2.Qf1#
    • 1...Qb4
      • 2.Qf1#
    • 1...Qb5
      • 2.Qf1#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qd3#
      • 1...Qxc2
        • 2.Qxc2#
      • 1...Qf1
        • 2.Qxf1#
      • 1...Qb3
        • 2.cxb3#
      • 1...Sd4
        • 2.Rc5#
      • 1...Sf4
        • 2.Re4#
      • 1...Sc7
        • 2.Re4#
      • 1...Sg7
        • 2.Re4#
      • 1...Sf8
        • 2.Re4#
      • 1...Sc5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qd3#
      • 1...Qxc2
        • 2.Sb6#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Qf1
        • 2.Sb6#
      • 1...Qb3
        • 2.cxb3#
      • 1...Sd4
        • 2.Rc5#
      • 1...Sf4
        • 2.Rc5#
      • 1...Sc7
        • 2.Rc5#
      • 1...Sg7
        • 2.Rc5#
      • 1...Sf8
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::QAB(H)
    • Q(a);N_GUARD::QAB(H),XQ(a)
  • Tries
    • Try
      • Q(H);N_PINS(g)
      • Threat
        • QAB1(H)
      • Vars
        • Q(a);OGATE,XP(B)::QAR2(H),XQ(a)
        • Q(a);N_GUARD::QAB(H),XQ(a)
        • Q(a);OGATE::P(B),XQ(a)
        • S(g);N_GUARD,N_SPINB(c),P_PINQ(H),SBLOCK::R1(F)
        • S(g);N_GUARD,N_SPINB(c),P_PINQ(H)::R(F)
        • S(g);N_GUARD,P_PINQ(H)::R(F)
      • Refutation
        • S(g);P_PINQ(H)
  • Actual
    • Q(H);N_PINS(g)
    • Threat
      • QAB1(H)
    • Vars
      • Q(a);N_GUARD,XP(B)::S(I)
      • S(g);N_GUARD,P_PINQ(H)::R1(F),XS(g)
      • Q(a);N_GUARD::S(I)
      • Q(a);OGATE::P(B),XQ(a)
      • S(g);N_GUARD,N_SPINB(c),P_PINQ(H)::R1(F)
      • S(g);N_GUARD,P_PINQ(H)::R1(F)
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