MESON Chess Problem Database

Problem Display
PID: 82494 (8/8/3Q3b/8/NK2B3/p1B3p1/4n3/2kN4 w - - 0 1)

Havel, Miroslav

Mlada Fronta, 1947

8/8/3Q3b/8/NK2B3/p1B3p1/4n3/2kN4

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Qxd2#
    • 1...Bg7
      • 2.Qd2#
    • 1...Sf4
      • 2.Qd2#
    • 1...a2
      • 2.Bb2#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qd1#
      • 1...Sxc3
        • 2.Qxh6#
      • 1...Bd2
        • 2.Bxd2#
        • 2.Qxd2#
      • 1...Bf8
        • 2.Bd2#
      • 1...Sd4
        • 2.Qxh6#
      • 1...gxf2!
    • 1.Sc5?
      • threat
        • 2.Sb3#
      • 1...Bd2
        • 2.Qxd2#
      • 1...Sd4!
    • 1.Qd3?
      • threat
        • 2.Qb1#
        • 2.Qc2#
      • 1...Sxc3
        • 2.Qc2#
      • 1...Sd4
        • 2.Qb1#
      • 1...a2
        • 2.Bb2#
        • 2.Qc2#
      • 1...Bf8+!
    • 1.Qxh6+?
      • 1...Kxd1
        • 2.Qd2#
      • 1...Sf4!
  • Keys
    • 1.Sdb2!
      • threat
        • 2.Qd1#
      • 1...Sxc3
        • 2.Qxh6#
      • 1...axb2
        • 2.Bxb2#
      • 1...Bd2
        • 2.Bxd2#
        • 2.Qxd2#
      • 1...Bf8
        • 2.Bd2#
      • 1...Sd4
        • 2.Qxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(e);N_GUARD,P_PINB(B)::QAB1(F),XB(e)
    • B(e);N_GUARD::QAB1(F)
    • S(b);S_CUTB(e)::QAB1(F)
    • P(c);N_GUARD::B(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR1(F)
      • Vars
        • S(b);N_GUARD,XB(B)::QAB(F),XB(e)
        • B(e);N_GUARD,P_PINQ(F)::B(B)
        • S(b);N_GUARD::QAB(F),XB(e)
      • Refutation
        • P(d);XS(A)
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • B(e);N_GUARD,P_PINB(B)::QAB1(F),XB(e)
      • Refutation
        • S(b);
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XB(B)::QAR1(F)
        • S(b);::QAR1(F)
      • Refutation
        • B(e);CHECK
    • Try
      • Q(F);CHECK,XB(e)
      • Vars
        • K(a);P-FLIGHT,XS(A)::QAR1(F)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • S(A);
    • Threat
      • QAR1(F)
    • Vars
      • S(b);N_GUARD,XB(B)::QAB(F),XB(e)
      • P(c);OGATE,XS(A)::B(B),XP(c)
      • B(e);N_GUARD,P_PINQ(F)::B(B)
      • S(b);N_GUARD::QAB(F),XB(e)
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