MESON Chess Problem Database

Problem Display
PID: 120832 (2b4b/6B1/4B3/qp1R4/pp1p4/8/k1P1N1R1/2Q2K2 w - - 0 1)

Lider, Valentin Viktorovich

Thema Danicum, 1978

2b4b/6B1/4B3/qp1R4/pp1p4/8/k1P1N1R1/2Q2K2

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qb2#
      • 2.Qa1#
  • Tries
    • 1.Sc3+?
      • 1...bxc3
        • 2.Rd7#
      • 1...dxc3!
    • 1.Bxd4?
      • threat
        • 2.Qb2#
        • 2.Qa1#
      • 1...a3
        • 2.Qa1#
      • 1...Bxd4!
    • 1.Qb1+?
      • 1...Ka3
        • 2.Qa1#
      • 1...Kxb1!
  • Keys
    • 1.c4!
      • threat
        • 2.Sxd4#
      • 1...Kb3
        • 2.Sxd4#
      • 1...bxc4 ep
        • 2.Rd7#
      • 1...dxc4 ep
        • 2.Rd2#
      • 1...b3
        • 2.Sc3#
      • 1...d3
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • P(c);XS(D)::B(G)+R(F)
      • Refutation
        • P(d);XS(D)
    • Try
      • B(H);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • B(h);XB(H)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • P(C);
    • Threat
      • R(E)+S(D),XP(d)
    • Vars
      • K(a);S_FLIGHT::S(D),XP(d)
      • P(c);EP,OGATEB,XP(C)::B(G)+R(F)
      • P(d);EP,OGATE,XP(C)::B(G)+R(F),DCHECK
      • P(c);SBLOCK::R(E)+S(D),DCHECK
      • P(d);::QAR1(A)
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