MESON Chess Problem Database

Problem Display
PID: 52488 (5r2/8/4R3/8/1B1p2pp/1B1k2PN/1p1p1P2/r4RQK w - - 0 1)

Lider, Valentin Viktorovich

Comm., Het Belgisch Schaakbord (L'Echiquier Belge), 1986-1987

5r2/8/4R3/8/1B1p2pp/1B1k2PN/1p1p1P2/r4RQK

#2

9 + 8

5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf1
      • 2.Qxf1#
    • 1...Rxf2
      • 2.Sxf2#
    • 1...Rf4
      • 2.Sxf4#
    • 1...Ra8
      • 2.Sf4#
    • 1...Rb8
      • 2.Sf4#
    • 1...Rc8
      • 2.Sf4#
    • 1...Rd8
      • 2.Sf4#
    • 1...Re8
      • 2.Sf4#
    • 1...Rg8
      • 2.Sf4#
    • 1...Rh8
      • 2.Sf4#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Rxd2#
        • 2.Qf1#
      • 1...Rxf2
        • 2.Sxf2#
      • 1...b1S
        • 2.Qf1#
      • 1...Rxd1!
    • 1.f4?
      • threat
        • 2.Sf2#
      • 1...Rxf1
        • 2.Qxf1#
      • 1...Rxf4
        • 2.Sxf4#
      • 1...gxh3
        • 2.Rf3#
      • 1...hxg3
        • 2.Qxg3#
      • 1...d1S!
  • Keys
    • 1.Rb1!
      • threat
        • 2.Qf1#
      • 1...Rxb1
        • 2.Qxb1#
      • 1...Rxf2
        • 2.Sxf2#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1B
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • R(a);OGATE,P_PINQ(B),XR(A)::QAB(B),XR(a)
    • R(h);XP(D)::S(G),XR(h)
    • R(h);N_GUARD::S(G),XR(h)
    • R(h);N_GUARD::S(G)
  • Tries
    • Try
      • R(A);P_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);XP(D)::S(G),XR(h)
        • P(b);::QAB(B)
      • Refutation
        • R(a);N_SPINP(c),P_PINQ(B),XR(A)
    • Try
      • P(D);
      • Threat
        • S(G)
      • Vars
        • R(a);OGATE,P_PINQ(B),XR(A)::QAB(B),XR(a)
        • R(h);XP(D)::S(G),XR(h)
        • P(f);N_GUARD,XS(G)::R(A)
        • P(g);OGATE,XP(F)::QAR(B),XP(g)
      • Refutation
        • P(c);
  • Actual
    • R(A);
    • Threat
      • QAB(B)
    • Vars
      • R(a);OGATE,P_PINQ(B),XR(A)::QAB(B),XR(a)
      • R(h);XP(D)::S(G),XR(h)
      • P(c);OGATEB,P_PINQ(B)::QAR2(B),XQ(c)
      • P(c);OGATEB::QAR2(B),XB(c)
      • P(c);OGATEB,P_PINQ(B)::QAR2(B),XR(c)
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