MESON Chess Problem Database

Problem Display
PID: 109707 (8/K1nB1N2/RB4b1/1p1k4/1PN5/2Pp1Pp1/4Qb1q/2R5 w - - 0 1)

Wielgos, Oskar

El Ajedrez Espanol, 1963

8/K1nB1N2/RB4b1/1p1k4/1PN5/2Pp1Pp1/4Qb1q/2R5

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qa2#
    • 1...Be1
      • 2.Se3#
    • 1...Be3
      • 2.Sxe3#
    • 1...Bxb6+
      • 2.Sxb6#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bh5
      • 2.Qe4#
    • 1...Bxf7
      • 2.Qe4#
    • 1...Sxa6
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sa8
      • 2.Qe6#
    • 1...Se8
      • 2.Qe6#
    • 1...bxc4
      • 2.Qe5#
  • Tries
    • 1.Bxf2?
      • threat
        • 2.Se3#
        • 2.Sb6#
      • 1...Kxc4
        • 2.Qa2#
      • 1...Bxf7
        • 2.Qxd3#
        • 2.Qe4#
      • 1...bxc4
        • 2.Bc6#
        • 2.Rd6#
        • 2.Qe5#
      • 1...Qh6
        • 2.Sb6#
      • 1...Sa8
        • 2.Se3#
        • 2.Be6#
        • 2.Qe6#
      • 1...Qxf2+!
    • 1.Bc5?
      • threat
        • 2.Sb6#
      • 1...Kxc4
        • 2.Qa2#
      • 1...bxc4
        • 2.Bc6#
        • 2.Rd6#
        • 2.Qe5#
      • 1...Sa8
        • 2.Be6#
        • 2.Qe6#
      • 1...Bxc5+!
    • 1.Bc6+?
      • 1...Kxc4
        • 2.Qa2#
      • 1...Kxc6!
    • 1.Be6+?
      • 1...Kc6
        • 2.Sa5#
        • 2.Sce5#
        • 2.Sfe5#
        • 2.Sd8#
      • 1...Sxe6!
    • 1.Qxd3+?
      • 1...Bd4
        • 2.Se3#
        • 2.Qxd4#
      • 1...Bxd3!
  • Keys
    • 1.Be3!
      • threat
        • 2.Sb6#
      • 1...Bxe3+
        • 2.Sxe3#
      • 1...Kxc4
        • 2.Qa2#
      • 1...Bxf7
        • 2.Qxd3#
      • 1...bxc4
        • 2.Rd6#
      • 1...Sa8
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • K(f);P_SPINP(c),S_FLIGHT,XS(F)::QAB(B)
    • B(a);N_GUARD,N_PINB(H)::S(F)
    • B(a);N_GUARD::S(F),XB(a)
    • B(a);CHECK,XB(H)::S(F),XB(a)
    • B(g);N_GUARD::QAB1(B),XB(g)
    • B(g);N_GUARD::QAB1(B)
    • B(g);N_GUARD,XS(K)::QAB1(B)
    • S(h);N_GUARD,XR(G)::QAB1(B)
    • S(h);N_GUARD::QAB1(B),XS(h)
    • S(h);N_GUARD::QAB1(B)
    • P(e);SBLOCK,XS(F)::QAR1(B)
  • Tries
    • Try
      • B(H);N_SPINB(H),XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(f);OGATEB,P_SPINP(c),S_FLIGHT,XS(F)::QAB(B)
        • Q(b);::S(F)
      • Refutation
        • Q(b);CHECK,XB(H)
    • Try
      • B(H);
      • Threat
        • S(F)
      • Vars
        • K(f);P_SPINP(c),S_FLIGHT,XS(F)::QAB(B)
      • Refutation
        • B(a);CHECK,XB(H)
    • Try
      • B(J);CHECK
      • Vars
        • K(f);P_SPINP(c),S_FLIGHT,XS(F)::QAB(B)
      • Refutation
        • K(f);S_FLIGHT,XB(J)
    • Try
      • B(J);CHECK
      • Refutation
        • S(h);XB(J)
    • Try
      • Q(B);CHECK,XP(c)
      • Refutation
        • B(g);XQ(B)
  • Actual
    • B(H);
    • Threat
      • S(F)
    • Vars
      • B(a);CHECK,XB(H)::S(F),XB(a)
      • K(f);P_SPINP(c),S_FLIGHT,XS(F)::QAB(B)
      • B(g);N_GUARD,XS(K)::QAR2(B),XP(c)
      • P(e);SBLOCK,XS(F)::R1(G)
      • S(h);N_GUARD::B(J)
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