MESON Chess Problem Database

Problem Display
PID: 180369 (4r3/1p1N4/5P1q/bKBk1P2/2RN1n2/3P1p2/6B1/3Rr3 w - - 0 1)

Lider, Valentin Viktorovich

2nd HM., Ellerman MT, 1974

4r3/1p1N4/5P1q/bKBk1P2/2RN1n2/3P1p2/6B1/3Rr3

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Se2?
      • threat
        • 2.Rd4#
      • 1...Qxf6
        • 2.Sxf4#
      • 1...Re4
        • 2.dxe4#
      • 1...Bc3
        • 2.Sxc3#
      • 1...Se6
        • 2.Bxf3#
      • 1...Sxe2!
    • 1.Se6?
      • threat
        • 2.Rd4#
      • 1...Qxf6
        • 2.Sxf4#
      • 1...Bc3
        • 2.Sc7#
      • 1...Re4
        • 2.dxe4#
      • 1...Se2
        • 2.Bxf3#
      • 1...Sxe6!
  • Keys
    • 1.Sxf3!
      • threat
        • 2.Rd4#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...Bc3
        • 2.Sb6#
      • 1...R1e4
        • 2.dxe4#
      • 1...R8e4
        • 2.dxe4#
      • 1...Se2
        • 2.Sfe5#
      • 1...Se6
        • 2.Sxe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • R1(D)
      • Vars
        • Q(f);N_GUARD,XP(I)::S(E),XS(c)
        • R(h);N_SPINP(b),OGATE::R(A)+P(C)DCHECK,XR(h)
        • B(d);N_GUARD::S(E),XB(d)
        • S(c);S_CUTR(h)::B(B),XP(b)
      • Refutation
        • S(c);XS(E)
    • Try
      • S(E);
      • Threat
        • R1(D)
      • Vars
        • Q(f);N_GUARD,XP(I)::S(E),XS(c)
        • B(d);N_GUARD::S(E)
        • R(a);N_SPINP(b),OGATE::R(A)+P(C)DCHECK,XR(a)
        • S(c);S_CUTR(a)::B(B),XP(b)
      • Refutation
        • S(c);XS(E)
  • Actual
    • S(E);XP(b)
    • Threat
      • R1(D)
    • Vars
      • Q(f);XP(I)::S(J),XQ(f)
      • B(d);N_GUARD::S(J)
      • R(a);OGATE::R(A)+P(C)DCHECK,XR(a)
      • R(h);OGATE::R(A)+P(C)DCHECK,XR(h)
      • S(c);N_GUARD,S_CUTR(a)::B(B)+S(E)
      • S(c);N_GUARD,S_CUTR(h)::B(B)+S(E),XR(a)
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