MESON Chess Problem Database

Problem Display
PID: 180433 (6R1/8/7p/3p1p1k/3K1Pn1/7N/B3RB2/3Q4 w - - 0 1)

Lider, Valentin Viktorovich

Problemas, 1990

6R1/8/7p/3p1p1k/3K1Pn1/7N/B3RB2/3Q4

#2

8 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Rxe3#
    • 1...Se5
      • 2.Rxe5#
  • Tries
    • 1.Bxd5?
      • threat
        • 2.Bf7#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sxf2!
    • 1.Bg3?
      • 1...Sh2
        • 2.Rxh2#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Se3
        • 2.Rxe3#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sf6!
    • 1.Rxg4?
      • 1...Kxg4
        • 2.Re3#
      • 1...fxg4!
    • 1.Qh1?
      • 1...Sxf2
        • 2.Sxf2#
      • 1...Se3
        • 2.Sg1#
      • 1...Se5
        • 2.Sg1#
      • 1...Sf6
        • 2.Sg1#
      • 1...Sh2!
  • Keys
    • 1.Re4!
      • 1...dxe4
        • 2.Bf7#
      • 1...fxe4
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(a);OGATEB::QAB(A)+R(C),XS(a)
  • Tries
    • Try
      • B(B);XP(b)
      • Threat
        • B(B)
      • Vars
        • S(a);OGATEB::QAB(A)+R(C),XS(a)
      • Refutation
        • S(a);XB(D)
    • Try
      • B(D);
      • Vars
        • S(a);OGATEB::QAB(A)+R(C),XS(a)
      • Refutation
        • S(a);
    • Try
      • R(H);XS(a)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(H)::QAB(A)+R(C)
      • Refutation
        • P(c);XR(H)
    • Try
      • Q(A);
      • Vars
        • S(a);XB(D)::QAR(A)+S(E),XS(a)
        • S(a);N_GUARD::QAR(A)+S(E)
      • Refutation
        • S(a);
  • Actual
    • R(C);P_PINS(a)
    • Vars
      • P(b);OGATE,XR(C)::B(B)
      • P(c);N_GUARD,XR(C)::QAB1(A),XS(a)
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