MESON Chess Problem Database

Problem Display
PID: 116961 (2B5/4b1Q1/NBrkr3/1p1q1p2/3N4/8/p1R1R1p1/n2K2n1 w - - 0 1)

Keirans, Arturs

7th Place, 01. USSR Championship, 1946-1947

2B5/4b1Q1/NBrkr3/1p1q1p2/3N4/8/p1R1R1p1/n2K2n1

#2

8 + 11

14752 Soviet Chess Compositions (1945-1947) 1949
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4+
      • 2.Qxd4#
    • 1...Rc7
      • 2.Bxc7#
    • 1...Rf6
      • 2.Qxe7#
    • 1...Rg6
      • 2.Qxe7#
    • 1...Rh6
      • 2.Qxe7#
    • 1...Bh4
      • 2.Qd7#
    • 1...Bg5
      • 2.Qd7#
    • 1...Bf6
      • 2.Qd7#
    • 1...Bd8
      • 2.Qd7#
    • 1...Bf8
      • 2.Qd7#
  • Keys
    • 1.Sc7!
      • threat
        • 2.Se8#
      • 1...Qxd4+
        • 2.Qxd4#
      • 1...Rxc7
        • 2.Bxc7#
      • 1...Qb3
        • 2.Sxf5#
      • 1...Qf3
        • 2.Sdxb5#
      • 1...Qc4
        • 2.Sxf5#
      • 1...Qe4
        • 2.Sdxb5#
      • 1...Qc5
        • 2.Rxe6#
      • 1...Qe5
        • 2.Rxc6#
      • 1...Bh4
        • 2.Qd7#
      • 1...Bg5
        • 2.Qd7#
      • 1...Bf6
        • 2.Qd7#
      • 1...Bd8
        • 2.Qd7#
      • 1...Bf8
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(f);CHECK,OGATE,XS(D)::QAR2(G),XQ(f)
    • R(h);N_GUARD::B(F),XR(h)
    • R(j);N_GUARD::QAB1(G),XB(k)
    • B(k);OGATE::QAR1(G)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • Q(f);CHECK,OGATE,XS(D)::QAR2(G),XQ(f)
      • R(h);OGATE,XS(E)::B(F),XR(h)
      • Q(f);N_PINS(D),P_PINR(B)::S(D),XP(g)
      • Q(f);N_PINS(D),P_PINR(C)::S(D),XP(e)
      • Q(f);N_PINS(D)::S(D),XP(g)
      • Q(f);N_PINS(D)::S(D),XP(e)
      • Q(f);N_GUARD,N_PINS(D)::R1(C),XR(j)
      • Q(f);N_GUARD,N_PINS(D)::R1(B),XR(h)
      • B(k);OGATE::QAR1(G)
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