MESON Chess Problem Database

Problem Display
PID: 180310 (BB6/3P4/4bR2/3R4/1p1P1pN1/1K3kpP/2Q1N1np/6nq w - - 0 1)

Lider, Valentin Viktorovich

diagrammes, 1981

BB6/3P4/4bR2/3R4/1p1P1pN1/1K3kpP/2Q1N1np/6nq

#2

11 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5+
      • 2.Bxd5#
    • 1...Bf5
      • 2.Rdxf5#
    • 1...Bxd7
      • 2.Rxd7#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Qe4#
      • 1...Bxd5+
        • 2.Bxd5#
      • 1...Bxg4
        • 2.Re5#
      • 1...Sxh3
        • 2.Qe2#
      • 1...Bf5
        • 2.Rdxf5#
      • 1...bxc3!
    • 1.Rxe6?
      • threat
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rc5#
        • 2.Rde5#
        • 2.Rf5#
        • 2.Rg5#
        • 2.Rh5#
        • 2.Rdd6#
        • 2.Qe4#
      • 1...Sxh3
        • 2.Rg5#
      • 1...Se3!
  • Keys
    • 1.Sxf4!
      • 1...Bxd5+
        • 2.Bxd5#
      • 1...Bxg4
        • 2.Re5#
      • 1...Bxd7
        • 2.Rxd7#
      • 1...Sxh3
        • 2.Qe2#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...Bf5
        • 2.Rdxf5#
      • 1...Bf7
        • 2.Sxg2#
      • 1...Bg8
        • 2.Sxg2#
      • 1...Se2
        • 2.Qxe2#
      • 1...Se1
        • 2.Sxe6#
      • 1...Se3
        • 2.Se5#
      • 1...Sh4
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • B(i);CHECK,OGATE,P_SPINB(i),XR(G)::B(J),XB(i)
    • B(i);N_PINR(G),N_SPINP(h)::B(J)+R(G),XB(i)
    • B(i);N_PINR(G),XP(I)::B(J)+R(G),XB(i)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(A)
      • Vars
        • B(i);CHECK,OGATE,P_SPINB(i),XR(G)::B(J),XB(i)
        • B(i);N_PINR(G),XS(F)::B(J)+R(G)
        • S(a);N_GUARD,XP(D)::QAB1(A)
        • B(i);N_PINR(G),N_SPINP(h)::B(J)+R(G),XB(i)
      • Refutation
        • P(g);XS(B)
    • Try
      • R(H);N_PINP(h),N_SPINR(G),XB(i)
      • Threat
        • DUALS(9)
      • Vars
        • S(a);XP(D)::B(J)+R(G)
      • Refutation
        • S(c);
  • Actual
    • S(B);XP(h)
    • Vars
      • B(i);CHECK,OGATE,P_SPINB(i),XR(G)::B(J),XB(i)
      • B(i);N_PINR(G),XS(F)::B(J)+R(G)
      • B(i);N_PINR(G),XP(I)::B(J)+R(G),XB(i)
      • S(a);N_GUARD,XP(D)::QAB1(A)
      • S(c);OGATE,P_SPINS(c),XS(B)::R1(H),XS(c)
      • B(i);N_PINR(G)::B(J)+R(G),XB(i)
      • B(i);N_GUARD::R(H)+S(B),XS(c)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • S(c);N_GUARD::R(H)+S(B),XB(i)
      • S(c);SBLOCK::S(F)
      • S(c);N_GUARD::QAR2(A)
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