MESON Chess Problem Database

Problem Display
PID: 151152 (8/3Q4/3b3K/Np1k1p1b/1p1B4/4PR2/2qp1N2/8 w - - 0 1)

Alaikov, Venelin

Die Schwalbe, 1984

8/3Q4/3b3K/Np1k1p1b/1p1B4/4PR2/2qp1N2/8

#2

7 + 8

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Rxf5#
    • 1...Qb3
      • 2.Rxf5#
    • 1...Qa4
      • 2.Rxf5#
    • 1...Qc1
      • 2.Rxf5#
    • 1...Qa2
      • 2.Rxf5#
    • 1...Qb2
      • 2.Rxf5#
    • 1...Qc3
      • 2.Rxf5#
    • 1...Qc4
      • 2.Rxf5#
    • 1...Qc5
      • 2.Rxf5#
    • 1...Qc6
      • 2.Rxf5#
    • 1...Qc7
      • 2.Rxf5#
    • 1...Qc8
      • 2.Rxf5#
    • 1...Bxf3
      • 2.Qf7#
    • 1...Bg4
      • 2.Qf7#
    • 1...Bf7
      • 2.Qxf7#
  • Tries
    • 1.Kxh5?
      • threat
        • 2.Qf7#
      • 1...Qc7
        • 2.Rxf5#
      • 1...Qc8
        • 2.Rxf5#
      • 1...Qe4!
    • 1.Se4?
      • threat
        • 2.Sf6#
      • 1...Kxe4
        • 2.Qxf5#
      • 1...fxe4
        • 2.Rf5#
      • 1...Qxe4!
    • 1.Sc4?
      • threat
        • 2.Sb6#
      • 1...Kxc4
        • 2.Qe6#
      • 1...Qxc4
        • 2.Rxf5#
      • 1...bxc4!
    • 1.Qxf5+?
      • 1...Be5
        • 2.Qxe5#
      • 1...Qxf5!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Qxd6#
      • 1...Kxc5
        • 2.Qc6#
      • 1...Ke5
        • 2.Qxd6#
      • 1...Qxc5
        • 2.Rxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 14
  • Sets
    • Q(a);N_GUARD::R(C),XP(f)
    • B(g);N_GUARD,XR(C)::QAB(G)
    • B(g);N_GUARD::QAB(G)
    • B(g);N_GUARD::QAB(G),XB(g)
  • Tries
    • Try
      • K(F);P-FLIGHT,XB(g)
      • Threat
        • QAB(G)
      • Vars
        • Q(a);N_GUARD::R(C),XP(f)
      • Refutation
        • Q(a);
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • K(e);N_SPINB(h),S_FLIGHT,XS(A)::QAB1(G),XP(f)
        • P(f);SBLOCK,XS(A)::R(C)
      • Refutation
        • Q(a);XS(A)
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • K(e);N_SPINB(h),S_FLIGHT,XS(E)::QAB(G)
        • Q(a);N_GUARD,SBLOCK,XS(E)::R(C),XP(f)
      • Refutation
        • P(d);XS(E)
    • Try
      • Q(G);CHECK,N_PINB(h),XP(f)
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAR1(G),XB(h)
      • Refutation
        • Q(a);XQ(G)
  • Actual
    • B(D);
    • Threat
      • QAR1(G),XB(h)
    • Vars
      • K(e);N_SPINB(h),P-FLIGHT,XB(D)::QAR1(G)
      • K(e);N_SPINB(h),P-FLIGHT::QAB1(G),XB(h)
      • Q(a);N_GUARD,SBLOCK,XB(D)::R(C),XP(f)
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