MESON Chess Problem Database

Problem Display
PID: 44983 (8/1K1p4/8/pk6/4R3/bN6/P1QN4/2q1n3 w - - 0 1)

Frankenstein, Edward Nathan

Source?, 0000

8/1K1p4/8/pk6/4R3/bN6/P1QN4/2q1n3

#2

6 + 6

3316 Chess Problem Text Book 1887
15351 SCPF/BCPS Black Books 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Qc4#
    • 1...Qxd2
      • 2.Qc4#
    • 1...Qa1
      • 2.Qc4#
    • 1...Qb1
      • 2.Qc4#
    • 1...Qd1
      • 2.Qc4#
    • 1...Bb2
      • 2.a4#
    • 1...Bb4
      • 2.Sd4#
    • 1...Bc5
      • 2.a4#
    • 1...Bd6
      • 2.a4#
    • 1...Be7
      • 2.a4#
    • 1...Bf8
      • 2.a4#
  • Tries
    • 1.Qd3+?
      • 1...Qc4
        • 2.Qxc4#
      • 1...Sxd3!
    • 1.Qxc1?
      • threat
        • 2.Qc4#
      • 1...Bxc1
        • 2.a4#
      • 1...Sc2
        • 2.Qf1#
      • 1...d5
        • 2.Qc6#
      • 1...Bb4!
    • 1.Qc5+?
      • 1...Bxc5
        • 2.a4#
      • 1...Qxc5!
  • Keys
    • 1.Sb1!
      • threat
        • 2.Sc3#
      • 1...Qxb1
        • 2.Qc4#
      • 1...Qxc2
        • 2.Sxa3#
      • 1...Bb4
        • 2.Sd4#
      • 1...Qb2
        • 2.Qc4#
      • 1...Qd2
        • 2.Sxa3#
        • 2.Qc4#
      • 1...Qe3
        • 2.Sxa3#
        • 2.Qc4#
      • 1...Bb2
        • 2.a4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::QAB1(B)
    • Q(a);N_GUARD,XS(C)::QAB1(B)
    • B(c);OGATE::P(A)
    • B(c);SBLOCK::S(D)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB1(B),XQ(a)
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);XQ(a)
      • Threat
        • QAB1(B)
      • Vars
        • B(c);OGATE,XQ(B)::P(A)
        • S(b);OGATE::QAB(B)
        • P(f);N_GUARD::QAB1(B)
      • Refutation
        • B(c);
    • Try
      • Q(B);CHECK
      • Vars
        • B(c);OGATE,XQ(B)::P(A)
      • Refutation
        • Q(a);XQ(B)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • Q(a);N_GUARD,XS(C)::QAB1(B)
      • Q(a);N_GUARD,XQ(B)::S(C),XB(c)
      • B(c);SBLOCK::S(D)
      • Q(a);N_GUARD::QAB1(B)
      • B(c);OGATE::P(A)
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