MESON Chess Problem Database

Problem Display
PID: 103864 (B4b2/P1P1rn2/K1Q4B/RN2k1N1/1R4P1/P1P1p3/8/1b1n1q2 w - - 0 1)

Ancin, Andrej

Praca, 1949

B4b2/P1P1rn2/K1Q4B/RN2k1N1/1R4P1/P1P1p3/8/1b1n1q2

#2

13 + 8

14649 Andrej Ancin - Chess Compositions 2008
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Sf3#
    • 1...Qc4
      • 2.Sf3#
    • 1...Qxb5+
      • 2.Raxb5#
    • 1...Qe1
      • 2.Sf3#
    • 1...Qg1
      • 2.Sf3#
    • 1...Qf3
      • 2.Sxf3#
    • 1...Qf4
      • 2.Sd4#
    • 1...Qf6
      • 2.Sd6#
    • 1...Re6
      • 2.Qxe6#
    • 1...Rxc7
      • 2.Qe6#
    • 1...Rd7
      • 2.Qe6#
    • 1...Ba2
      • 2.Re4#
    • 1...Be4
      • 2.Rxe4#
    • 1...Sf2
      • 2.Sf3#
    • 1...Sxc3
      • 2.Qxc3#
    • 1...Sxg5
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sxh6
      • 2.Qd6#
    • 1...Sd8
      • 2.Qd6#
    • 1...Sh8
      • 2.Qd6#
  • Tries
    • 1.Sxf7+?
      • 1...Qxf7
        • 2.Qd6#
      • 1...Rxf7!
    • 1.Bg7+?
      • 1...Qf6
        • 2.Sd6#
        • 2.Sf3#
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...Bxg7!
    • 1.Qe4+?
      • 1...Kf6
        • 2.Sh7#
      • 1...Bxe4!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qd4#
      • 1...Qxb5+
        • 2.Raxb5#
      • 1...Sxg5
        • 2.Qd6#
      • 1...Qc4
        • 2.Sf3#
      • 1...Re6
        • 2.Qxe6#
      • 1...Be4
        • 2.Rxe4#
      • 1...Qd3
        • 2.Sf3#
      • 1...Qf4
        • 2.Sd4#
      • 1...Qf6
        • 2.Sd6#
      • 1...Rd7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 11
  • Sets
    • Q(c);N_GUARD::S(G)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::R(E),XQ(c)
    • Q(c);N_GUARD,N_PINS(F)::S(G)
    • Q(c);N_GUARD,N_PINS(F)::S(G),XQ(c)
    • Q(c);N_PINS(F),SBLOCK::R(E)+S(F)
    • Q(c);N_PINS(F),P_PINQ(I),SBLOCK::R(E)+S(F)
    • R(f);N_GUARD,P_PINQ(I)::QAR1(I),XR(f)
    • R(f);N_GUARD,XP(L)::QAR1(I)
    • R(f);N_GUARD::QAR1(I)
    • B(a);N_GUARD::R1(C)
    • B(a);N_GUARD::R1(C),XB(a)
    • S(b);S_CUTQ(c)::S(G)
    • S(b);OGATE,XP(B)::QAB(I),XS(b)
    • S(g);N_GUARD,XS(G)::QAB1(I)
    • S(g);N_GUARD::QAB1(I),XS(g)
    • S(g);N_GUARD,XB(J)::QAB1(I)
    • S(g);N_GUARD::QAB1(I)
  • Tries
    • Try
      • S(G);CHECK,XS(g)
      • Vars
        • Q(c);N_PINS(F),XS(G)::QAB1(I)
      • Refutation
        • R(f);XS(G)
    • Try
      • B(J);CHECK
      • Refutation
        • B(h);XB(J)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);S_FLIGHT::S(G)
      • Refutation
        • B(a);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::R(E),XQ(c)
      • S(g);N_GUARD,XS(G)::QAB1(I)
      • Q(c);N_GUARD::S(G)
      • R(f);N_GUARD,P_PINQ(I)::QAR1(I),XR(f)
      • B(a);N_GUARD::R1(C),XB(a)
      • Q(c);N_PINS(F),SBLOCK::R(E)+S(F)
      • Q(c);N_PINS(F),P_PINQ(I),SBLOCK::R(E)+S(F)
      • R(f);N_GUARD::QAR1(I)
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