MESON Chess Problem Database

Problem Display
PID: 180498 (3qn3/4p1n1/1NQ5/1R1PkP2/rp6/3BB2K/b3RP1P/b4r2 w - - 0 1)

Lider, Valentin Viktorovich

2nd Prize, Student, 1979

3qn3/4p1n1/1NQ5/1R1PkP2/rp6/3BB2K/b3RP1P/b4r2

#2

11 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Sd7#
    • 1...Qd7
      • 2.Sxd7#
    • 1...Qa8
      • 2.Sd7#
    • 1...Qb8
      • 2.Sd7#
    • 1...Rb1
      • 2.f4#
    • 1...Rc1
      • 2.f4#
    • 1...Rd1
      • 2.f4#
    • 1...Re1
      • 2.f4#
    • 1...Rg1
      • 2.f4#
    • 1...Rh1
      • 2.f4#
    • 1...Bb1
      • 2.Sc4#
    • 1...Bc4
      • 2.Sxc4#
    • 1...Bxd5
      • 2.Sc4#
    • 1...Sxf5
      • 2.Qe6#
    • 1...Sh5
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
  • Keys
    • 1.Qh6!
      • threat
        • 2.Bc5#
      • 1...Qxb6
        • 2.Bxb6#
      • 1...Qxd5
        • 2.Sd7#
      • 1...Rxf2
        • 2.Bxf2#
      • 1...Bxd5
        • 2.Sc4#
      • 1...Sxf5
        • 2.Qe6#
      • 1...Sf6
        • 2.Qf4#
      • 1...Re1
        • 2.f4#
      • 1...Bd4
        • 2.Bf4#
      • 1...Sd6
        • 2.Qxg7#
      • 1...b3
        • 2.d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 12
  • Sets
    • Q(i);N_GUARD,P_SPINQ(i),XP(H)::S(J)
    • Q(i);N_GUARD,P_PINP(I)::S(J),XQ(i)
    • Q(i);N_GUARD::S(J)
    • R(b);N_GUARD::P(B)
    • R(b);N_GUARD,P_PINP(C)::P(B)
    • B(c);N_GUARD::S(J)
    • B(c);N_GUARD::S(J),XB(c)
    • B(c);N_GUARD,P_SPINB(c),XP(H)::S(J)
    • S(h);N_GUARD,XP(I)::QAR1(K)
    • S(h);N_GUARD::QAR1(K)
    • S(h);N_GUARD::QAR1(K),XS(h)
  • Actual
    • Q(K);
    • Threat
      • R(A)+B(E)
    • Vars
      • Q(i);OGATE,XS(J)::R(A)+B(E),XQ(i)
      • Q(i);N_GUARD,P_SPINQ(i),XP(H)::S(J)
      • R(b);OGATE,XP(B)::R(A)+B(E),XR(b)
      • B(c);N_GUARD,P_SPINB(c),XP(H)::S(J)
      • S(h);N_GUARD,XP(I)::QAR1(K)
      • S(j);SBLOCK::QAB1(K)
      • R(b);N_GUARD::P(B)
      • B(a);SBLOCK::R(A)+B(E),DCHECK
      • S(j);N_GUARD,SBLOCK::QAB(K),XS(h)
      • P(e);S_CUTB(c)::R(G)+P(H)
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