MESON Chess Problem Database

Problem Display
PID: 118671 (8/3n4/1P1B4/1P1p4/1QBk1p1p/pP1P1RbR/P1K3p1/1n3bN1 w - - 0 1)

Siotis, Nikos

Canadian Chess Chat, 1980

8/3n4/1P1B4/1P1p4/1QBk1p1p/pP1P1RbR/P1K3p1/1n3bN1

#2

12 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be2
      • 2.Sxe2#
    • 1...Bxd3+
      • 2.Bxd3#
    • 1...Be1
      • 2.Rxf4#
    • 1...Bf2
      • 2.Rxf4#
    • 1...Sd2
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Se5
      • 2.Bc5#
      • 2.Qc5#
    • 1...Sxb6
      • 2.Qc5#
    • 1...Sf6
      • 2.Qc5#
    • 1...Sb8
      • 2.Qc5#
    • 1...Sf8
      • 2.Qc5#
    • 1...dxc4
      • 2.Qxc4#
  • Tries
    • 1.b7?
      • 1...Bxd3+
        • 2.Bxd3#
      • 1...dxc4
        • 2.Qxc4#
      • 1...Be2
        • 2.Sxe2#
      • 1...Be1
        • 2.Rxf4#
      • 1...Bf2
        • 2.Rxf4#
      • 1...Sd2
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Se5
        • 2.Bc5#
        • 2.Qc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...Sf6
        • 2.Qc5#
      • 1...Sb8
        • 2.Qc5#
      • 1...Sf8
        • 2.Qc5#
      • 1...Bh2!
  • Keys
    • 1.Qe1!
      • 1...Bxd3+
        • 2.Rxd3#
      • 1...Bxe1
        • 2.Rxf4#
      • 1...Sxb6
        • 2.Qe5#
      • 1...dxc4
        • 2.Qe4#
      • 1...Bh2
        • 2.Qf2#
      • 1...Be2
        • 2.Sxe2#
      • 1...Bf2
        • 2.Rxf4#
        • 2.Qxf2#
      • 1...Sd2
        • 2.Qa1#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sc5
        • 2.Be5#
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf6
        • 2.Qe5#
      • 1...Sb8
        • 2.Qe5#
      • 1...Sf8
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 7
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::S(A),XB(b)
    • B(b);CHECK,OGATE,XP(E)::QAR(H)+B(I),XB(b)
    • B(e);N_GUARD::R(F),XP(g)
    • S(a);N_GUARD::QAB1(H)
    • S(a);N_GUARD::QAB1(H),XS(a)
    • S(j);N_GUARD::QAB1(H),XS(j)
    • S(j);N_GUARD,XP(K)::QAB1(H)
    • S(j);N_GUARD::QAB1(H)
    • P(i);OGATE,P_SPINP(i),XB(I)::QAR1(H),XP(i)
  • Tries
    • Try
      • P(K);
      • Vars
        • B(b);CHECK,OGATE,XP(E)::QAR(H)+B(I),XB(b)
        • P(i);OGATE,P_SPINP(i),XB(I)::QAR1(H),XP(i)
        • B(b);N_GUARD::S(A),XB(b)
        • B(e);N_GUARD::R(F),XP(g)
        • S(a);N_GUARD::QAB1(H)
        • S(a);N_GUARD::QAB1(H),XS(a)
        • S(j);N_GUARD::QAB1(H),XS(j)
        • S(j);N_GUARD::QAB1(H)
      • Refutation
        • B(e);
  • Actual
    • Q(H);
    • Vars
      • B(b);CHECK,OGATE,XP(E)::R1(F),XB(b)
      • B(e);N_GUARD,XQ(H)::R(F),XP(g)
      • S(j);N_GUARD,XP(K)::QAB1(H)
      • P(i);N_GUARD,XB(I)::QAR1(H)
      • B(e);N_GUARD::QAB(H)
      • B(b);N_GUARD::S(A),XB(b)
      • S(a);OGATE::QAB(H)
      • S(a);N_GUARD::QAB1(H),XS(a)
      • S(j);N_GUARD::QAB1(H),XS(j)
      • S(j);N_GUARD::QAB1(H)
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