MESON Chess Problem Database

Problem Display
PID: 196480 (3q4/8/Q4N2/5bp1/2r4p/4N1Pk/3P3P/3B2K1 w - - 0 1)

Jankevics, Karlis

Sachova skladba, 2011

3q4/8/Q4N2/5bp1/2r4p/4N1Pk/3P3P/3B2K1

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qf1#
    • 1...Rc2
      • 2.Qf1#
    • 1...Rc3
      • 2.Qf1#
    • 1...Ra4
      • 2.Qf1#
    • 1...Rb4
      • 2.Qf1#
    • 1...Rd4
      • 2.Qf1#
    • 1...Re4
      • 2.Qf1#
    • 1...Rg4
      • 2.Qf1#
    • 1...Rc5
      • 2.Qf1#
    • 1...Rc6
      • 2.Qf1#
    • 1...Rc7
      • 2.Qf1#
    • 1...Rc8
      • 2.Qf1#
    • 1...Be4
      • 2.Bg4#
  • Tries
    • 1.Bg4+?
      • 1...Rxg4
        • 2.Qf1#
      • 1...Bxg4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sf2#
      • 1...Qxd2
        • 2.Sxg5#
      • 1...Rxe4
        • 2.Qf1#
      • 1...Bxe4
        • 2.Bg4#
      • 1...hxg3
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • R(b);OGATE,P_PINB(A)::QAB(G)
    • R(b);OGATE::QAB(G)
    • R(b);OGATE,P_PINP(F)::QAB(G)
    • B(d);N_GUARD,S_CUTR(b)::B(A)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • R(b);OGATE,P_PINP(F),XB(A)::QAB(G)
      • Refutation
        • B(d);XB(A)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • Q(f);N_GUARD,XP(C)::S(H),XP(e)
      • R(b);OGATE,XS(H)::QAB(G)
      • B(d);N_GUARD,XS(H)::B(A)
      • P(c);OGATEB,XP(F)::QAR(G)
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