MESON Chess Problem Database

Problem Display
PID: 180459 (5B2/6K1/B7/3p1Rp1/n2k1p2/3p1P2/1n1QP3/4R3 w - - 0 1)

Lider, Valentin Viktorovich

Problemas, 1978

5B2/6K1/B7/3p1Rp1/n2k1p2/3p1P2/1n1QP3/4R3

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qxd3#
    • 1...Sc4
      • 2.Qxd3#
  • Tries
    • 1.Rc1?
      • 1...Sd1
        • 2.Qxd3#
      • 1...Sc4
        • 2.Qxd3#
      • 1...Sc5
        • 2.Bxc5#
      • 1...Sb6
        • 2.Bc5#
      • 1...g4
        • 2.Qxf4#
      • 1...Sc3!
    • 1.Rxf4+?
      • 1...Ke5
        • 2.Qe3#
        • 2.exd3#
      • 1...gxf4!
    • 1.e4?
      • threat
        • 2.Rxd5#
      • 1...dxe4
        • 2.Rxe4#
      • 1...Sc3
        • 2.Qf2#
      • 1...Sb6
        • 2.Qxb2#
      • 1...fxe4 ep!
  • Keys
    • 1.exd3!
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Sc3
        • 2.Qf2#
      • 1...Sd1
        • 2.Qb4#
      • 1...Sc4
        • 2.dxc4#
      • 1...Sc5
        • 2.Qxb2#
      • 1...Sb6
        • 2.Qxb2#
      • 1...g4
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(B),XP(b)
  • Tries
    • Try
      • R(A);
      • Vars
        • S(a);N_GUARD::QAR1(B),XP(b)
        • S(c);N_GUARD::B(H),XS(c)
        • S(c);N_GUARD::B(H)
        • P(g);N_GUARD::QAR2(B),XP(e)
      • Refutation
        • S(c);
    • Try
      • R(E);CHECK,XP(e)
      • Refutation
        • P(g);XR(E)
    • Try
      • P(C);
      • Threat
        • R1(E),XP(f)
      • Vars
        • P(f);OGATE,XP(C)::R1(A),XP(f)
        • S(c);SBLOCK::QAB(B)
        • S(c);N_GUARD::QAB(B),XS(a)
      • Refutation
        • P(e);EP,XP(C)
  • Actual
    • P(C);XP(b)
    • Vars
      • S(a);OGATE,P_SPINS(a),XP(C)::QAR1(B),XS(a)
      • S(c);SBLOCK::QAB(B)
      • S(a);N_GUARD::QAR2(B)
      • S(a);OGATE::QAR(B)+P(C),XS(a)
      • S(c);N_GUARD::QAB(B),XS(a)
      • P(g);N_GUARD::R(E),XP(e)
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