MESON Chess Problem Database

Problem Display
PID: 222810 (1B5k/7P/3p2PP/2p5/K7/1p6/1P4Q1/3n4 w - - 0 1)

Wieman, LH

Baltimore American and Commercial Advertiser, 1883

1B5k/7P/3p2PP/2p5/K7/1p6/1P4Q1/3n4

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb2+
      • 2.Qxb2#
    • 1...d5
      • 2.Be5#
  • Tries
    • 1.Bxd6?
      • threat
        • 2.Be5#
        • 2.Qa8#
      • 1...Sxb2+
        • 2.Qxb2#
      • 1...Sc3+!
    • 1.Bc7?
      • threat
        • 2.Qa8#
      • 1...Sxb2+
        • 2.Qxb2#
      • 1...d5
        • 2.Be5#
      • 1...Sc3+!
    • 1.Qf3?
      • threat
        • 2.Qf6#
        • 2.Qf8#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sxb2+!
    • 1.Qh3?
      • threat
        • 2.Qc8#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sxb2+!
    • 1.Qc2?
      • threat
        • 2.g7#
      • 1...Sxb2+
        • 2.Qxb2#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...bxc2!
  • Keys
    • 1.Qd2!
      • 1...Sxb2+
        • 2.Qxb2#
      • 1...Sc3+
        • 2.Qxc3#
      • 1...Sf2
        • 2.Qc3#
      • 1...Se3
        • 2.Qc3#
      • 1...c4
        • 2.Qd4#
      • 1...d5
        • 2.Be5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);CHECK,OGATE,XP(A)::QAB(B),XS(a)
    • P(d);OGATE::B(G)
  • Tries
    • Try
      • B(G);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,OGATE,XP(A)::QAB(B),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • B(G);
      • Threat
        • QAB1(B)
      • Vars
        • S(a);CHECK,OGATE,XP(A)::QAB(B),XS(a)
        • P(d);OGATE::B(G)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::QAB(B),XS(a)
      • Refutation
        • S(a);CHECK,XP(A)
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • S(a);CHECK,N_GUARD::QAB(B),XS(a)
      • Refutation
        • S(a);CHECK,XP(A)
    • Try
      • Q(B);
      • Threat
        • P(D)
      • Vars
        • S(a);CHECK,OGATE,XP(A)::QAB(B),XS(a)
        • S(a);CHECK,N_GUARD::QAB(B),XS(a)
      • Refutation
        • P(b);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • S(a);CHECK,OGATE,XP(A)::QAB(B),XS(a)
      • S(a);CHECK,N_GUARD::QAB(B),XS(a)
      • S(a);N_GUARD::QAB(B)
      • P(c);N_GUARD::QAB(B)
      • P(d);OGATE::B(G)
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