MESON Chess Problem Database

Problem Display
PID: 56660 (K1N5/n1PkNB2/2nB4/1P5p/6q1/7Q/4R3/8 w - - 0 1)

Ancin, Andrej

3rd Prize, Themes-64, 1967

K1N5/n1PkNB2/2nB4/1P5p/6q1/7Q/4R3/8

#2

9 + 5

3772 FIDE Album (1965-1967) 1976
14649 Andrej Ancin - Chess Compositions 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qe6
      • 2.Qxe6#
    • 1...h4
      • 2.Qxg4#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Sdb6#
      • 1...Kxc8
        • 2.Sb6#
      • 1...Sxc8!
    • 1.Bh2?
      • threat
        • 2.Sb6#
      • 1...Sxc8
        • 2.bxc6#
      • 1...Qe6
        • 2.Qxe6#
      • 1...Se5!
    • 1.Bg3?
      • threat
        • 2.Sb6#
      • 1...Sxc8
        • 2.bxc6#
      • 1...Qe6
        • 2.Qxe6#
      • 1...Se5!
    • 1.Bf4?
      • threat
        • 2.Sb6#
      • 1...Sxc8
        • 2.bxc6#
      • 1...Qe6
        • 2.Qxe6#
      • 1...Se5!
    • 1.Rd2?
      • threat
        • 2.Sb6#
      • 1...Sxc8
        • 2.bxc6#
      • 1...Sd4!
    • 1.Re6?
      • threat
        • 2.Sb6#
      • 1...Qxe6
        • 2.Qxe6#
      • 1...Sxc8
        • 2.bxc6#
      • 1...Qd4
        • 2.Re4#
      • 1...Qg8
        • 2.Rg6#
      • 1...Qg1!
    • 1.Qd3?
      • threat
        • 2.Sb6#
      • 1...Sxc8
        • 2.bxc6#
      • 1...Qg1
        • 2.Qf5#
      • 1...Qd4
        • 2.Qf5#
      • 1...Qg8
        • 2.Qf5#
      • 1...Sd4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sb6#
      • 1...Kxc8
        • 2.Be6#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Sxc8
        • 2.Be8#
      • 1...Qg1
        • 2.Sg3#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Qg8
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(a);OGATE::QAB(B),XQ(a)
    • Q(a);OGATE::QAB1(B),XQ(a)
    • P(b);N_GUARD::QAB(B),XQ(a)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • K(e);S_FLIGHT,XS(I)::S(F)
      • Refutation
        • S(d);XS(I)
    • Try
      • B(D);
      • Threat
        • S(I)
      • Vars
        • S(d);N_GUARD,XS(I)::P(C),XS(c)
        • Q(a);OGATE::QAB1(B),XQ(a)
      • Refutation
        • S(c);
    • Try
      • B(D);
      • Threat
        • S(I)
      • Vars
        • S(d);N_GUARD,XS(I)::P(C),XS(c)
        • Q(a);OGATE::QAB1(B),XQ(a)
      • Refutation
        • S(c);
    • Try
      • B(D);
      • Threat
        • S(I)
      • Vars
        • S(d);N_GUARD,XS(I)::P(C),XS(c)
        • Q(a);OGATE::QAB1(B),XQ(a)
      • Refutation
        • S(c);
    • Try
      • R(A);
      • Threat
        • S(I)
      • Vars
        • S(d);N_GUARD,XS(I)::P(C),XS(c)
      • Refutation
        • S(c);
    • Try
      • R(A);N_PINQ(a)
      • Threat
        • S(I)
      • Vars
        • Q(a);OGATE,P_SPINQ(a),XR(A)::QAB1(B),XQ(a)
        • S(d);N_GUARD,XS(I)::P(C),XS(c)
        • Q(a);OGATEB::QAB(B)+R(A)
        • Q(a);OGATEB,P_PINS(I)::QAB(B)+R(A)
      • Refutation
        • Q(a);
    • Try
      • Q(B);N_PINQ(a)
      • Threat
        • S(I)
      • Vars
        • S(d);N_GUARD,XS(I)::P(C),XS(c)
        • Q(a);N_GUARD::QAB(B)
        • Q(a);N_GUARD,P_PINS(I)::QAB(B)
      • Refutation
        • S(c);
  • Actual
    • S(F);N_PINQ(a)
    • Threat
      • S(I)
    • Vars
      • K(e);S_FLIGHT,XS(I)::B(G)
      • Q(a);OGATE,P_SPINQ(a),XS(F)::QAB(B),XQ(a)
      • S(d);SBLOCK,XS(I)::B(G)
      • Q(a);::QAB(B)+S(F)
      • Q(a);::QAB(B)+S(F),XQ(a)
      • Q(a);P_PINS(I)::QAB(B)+S(F)
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