MESON Chess Problem Database

Problem Display
PID: 181756 (2B3K1/7p/6pr/7n/4Nk2/1n3pp1/1Q3B2/1b2R3 w - - 0 1)

Prochazka, Hubert

HM., Western Daily Mercury, 1905

2B3K1/7p/6pr/7n/4Nk2/1n3pp1/1Q3B2/1b2R3

#2

6 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe4
      • 2.Be3#
    • 1...Sa1
      • 2.Qb8#
    • 1...Sc1
      • 2.Qb8#
    • 1...Sd2
      • 2.Qb8#
    • 1...Sd4
      • 2.Qb8#
    • 1...Sa5
      • 2.Qb8#
    • 1...Sc5
      • 2.Qb8#
    • 1...Sf6+
      • 2.Qxf6#
    • 1...Sg7
      • 2.Bxg3#
  • Tries
    • 1.Qc1+?
      • 1...Ke5
        • 2.Qg5#
      • 1...Sd2
        • 2.Qc7#
      • 1...Sxc1!
    • 1.Qd4?
      • threat
        • 2.Be3#
        • 2.Qd6#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...Bxe4
        • 2.Be3#
      • 1...gxf2
        • 2.Qd6#
      • 1...g5
        • 2.Be3#
      • 1...Sxd4!
    • 1.Qd2+?
      • 1...Ke5
        • 2.Qg5#
        • 2.Qd6#
      • 1...Sxd2!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qc7#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...Bxe4
        • 2.Be3#
      • 1...Sxg7
        • 2.Bxg3#
      • 1...g5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • B(a);SBLOCK,XS(D)::B(C)
    • S(b);OGATE::QAB(B)
    • S(f);CHECK,N_GUARD::QAR2(B),XS(f)
    • S(f);N_GUARD::B(C),XP(d)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::QAR2(B)
        • S(b);P_SPINS(b)::QAB(B)
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);CHECK,N_GUARD::QAR2(B),XS(f)
        • B(a);P_SPINB(a),XS(D)::B(C)
        • P(d);XB(C)::QAB(B)
        • P(g);::B(C)
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • S(b);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • S(f);CHECK,N_GUARD::QAR2(B),XS(f)
      • B(a);SBLOCK,XS(D)::B(C)
      • S(f);N_GUARD,XQ(B)::B(C),XP(d)
      • P(g);OGATE::QAB1(B),XP(g)
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