MESON Chess Problem Database

Problem Display
PID: 91996 (8/3Q3K/8/8/p4p2/B2B1N2/2b5/n2kN3 w - - 0 1)

Onitiu, Valerian

Wiener Schachzeitung, 1912

8/3Q3K/8/8/p4p2/B2B1N2/2b5/n2kN3

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb3
      • 2.Bc4#
    • 1...Bxd3+
      • 2.Qxd3#
  • Tries
    • 1.Be4+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Ke2!
    • 1.Bf5+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Ke2!
    • 1.Bg6+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Ke2!
    • 1.Qc6?
      • 1...Sb3
        • 2.Qxc2#
      • 1...Bb1
        • 2.Qc1#
      • 1...Bb3
        • 2.Qc1#
      • 1...Bxd3+!
    • 1.Qc8?
      • 1...Sb3
        • 2.Qxc2#
      • 1...Bb1
        • 2.Qc1#
      • 1...Bb3
        • 2.Qc1#
      • 1...Bxd3+!
    • 1.Qc7?
      • 1...Sb3
        • 2.Qxc2#
      • 1...Bb1
        • 2.Qc1#
      • 1...Bb3
        • 2.Qc1#
      • 1...Bxd3+!
  • Keys
    • 1.Qb5!
      • 1...Bxd3+
        • 2.Qxd3#
      • 1...Sb3
        • 2.Bxc2#
      • 1...Bb1
        • 2.Qxb1#
      • 1...Bb3
        • 2.Be2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(c);N_PINB(C)::QAR(E)+B(C)
    • B(c);CHECK,OGATE,P_SPINB(c),XB(C)::QAR2(E),XB(c)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR2(E),XB(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR2(E),XB(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR2(E),XB(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • S(a);N_GUARD::QAB1(E),XB(c)
        • B(c);OGATE::QAR1(E)
        • B(c);N_PINB(C),OGATE::QAR1(E)
      • Refutation
        • B(c);CHECK,XB(C)
    • Try
      • Q(E);
      • Vars
        • S(a);N_GUARD::QAB1(E),XB(c)
        • B(c);OGATE::QAR1(E)
        • B(c);N_PINB(C),OGATE::QAR1(E)
      • Refutation
        • B(c);CHECK,XB(C)
    • Try
      • Q(E);
      • Vars
        • S(a);N_GUARD::QAB1(E),XB(c)
        • B(c);OGATE::QAR1(E)
        • B(c);N_PINB(C),OGATE::QAR1(E)
      • Refutation
        • B(c);CHECK,XB(C)
  • Actual
    • Q(E);
    • Vars
      • B(c);CHECK,OGATE,XB(C)::QAR2(E),XB(c)
      • S(a);N_GUARD::B(C),XB(c)
      • B(c);N_GUARD::QAR2(E),XB(c)
      • B(c);N_PINB(C)::B(C)
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