MESON Chess Problem Database

Problem Display
PID: 101165 (7K/r2N2B1/1P4R1/3k4/4q3/1P4b1/3rn3/Q6B w - - 0 1)

Olden, EG

Good Companions, 1921

7K/r2N2B1/1P4R1/3k4/4q3/1P4b1/3rn3/Q6B

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh1+
      • 2.Qxh1#
    • 1...Qg2
      • 2.Bxg2#
    • 1...Qf3
      • 2.Bxf3#
    • 1...Ra5
      • 2.Qxa5#
    • 1...Rb7
      • 2.Qa5#
    • 1...Rxd7
      • 2.Qa5#
    • 1...Ra8+
      • 2.Qxa8#
    • 1...Be1
      • 2.Qe5#
    • 1...Bf2
      • 2.Qe5#
    • 1...Bh4
      • 2.Qe5#
    • 1...Be5
      • 2.Qxe5#
    • 1...Sf4
      • 2.Qe5#
  • Keys
    • 1.Be5!
      • threat
        • 2.Rd6#
      • 1...Qxh1+
        • 2.Qxh1#
      • 1...Ra8+
        • 2.Qxa8#
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...Rxd7
        • 2.Qa5#
      • 1...Qg2
        • 2.Bxg2#
      • 1...Qf3
        • 2.Bxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • Q(d);CHECK,N_SPINQ(d),OGATE,XB(B)::QAB(A),XQ(d)
    • Q(d);OGATEB::B(B),XQ(d)
    • R(f);N_GUARD::QAR(A),XR(f)
    • R(f);N_GUARD::QAR(A)
    • R(f);N_GUARD,XS(F)::QAR(A)
    • R(f);CHECK,OGATE::QAB(A),XR(f)
    • B(c);N_GUARD::QAR1(A)
    • B(c);N_GUARD,P_PINB(G)::QAR1(A),XB(c)
    • S(b);S_CUTB(c)::QAR1(A)
  • Actual
    • B(G);
    • Threat
      • R1(E)
    • Vars
      • Q(d);CHECK,N_SPINQ(d),OGATE,XB(B)::QAB(A),XQ(d)
      • R(f);CHECK,OGATE::QAB(A),XR(f)
      • B(c);CHECK,OGATE,XB(G)::QAR1(A),XB(c)
      • R(f);N_GUARD,XS(F)::QAR(A)
      • Q(d);OGATEB::B(B),XQ(d)
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Developed and maintained by Brian Stephenson.
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