MESON Chess Problem Database

Problem Display
PID: 2544 (8/5q1p/3pRp2/1p2n3/5B1N/6Nr/QKP2kPn/R7 w - - 0 1)

Marble, Murray

1st Prize, Good Companions (April), 1915

8/5q1p/3pRp2/1p2n3/5B1N/6Nr/QKP2kPn/R7

#2

9 + 9

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qh5
      • 2.Qa7#
    • 1...Qxe6
      • 2.Qa7#
    • 1...Qg6
      • 2.Qa7#
    • 1...Qe8
      • 2.Qa7#
    • 1...Qg8
      • 2.Qa7#
    • 1...Qa7
      • 2.Qxa7#
    • 1...Qf8
      • 2.Qa7#
    • 1...Sf1
      • 2.Rxf1#
    • 1...Shf3
      • 2.Rf1#
    • 1...Shg4
      • 2.Rf1#
    • 1...Sef3
      • 2.Sh1#
      • 2.Re2#
    • 1...Seg4
      • 2.Sh1#
      • 2.Re2#
    • 1...Sc6
      • 2.Sh1#
      • 2.Re2#
    • 1...Sg6
      • 2.Sh1#
      • 2.Re2#
    • 1...Sd7
      • 2.Sh1#
      • 2.Re2#
  • Keys
    • 1.Kb3!
      • threat
        • 2.c3#
        • 2.c4#
      • 1...Qxe6+
        • 2.c4#
      • 1...Rxg3+
        • 2.c3#
      • 1...Sf1
        • 2.Rxf1#
      • 1...Qh5
        • 2.Qa7#
      • 1...Qg6
        • 2.Qa7#
      • 1...Qa7
        • 2.Qxa7#
      • 1...Shf3
        • 2.Rf1#
      • 1...Sd3
        • 2.Sh1#
        • 2.cxd3#
      • 1...Sef3
        • 2.Sh1#
      • 1...Sc4
        • 2.Re2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(h);N_GUARD::QAB(B)
    • Q(h);N_GUARD,XR(I)::QAB(B)
    • Q(h);N_GUARD::QAB(B),XQ(h)
    • S(b);N_GUARD::R1(A),XS(b)
    • S(b);N_GUARD::R1(A)
  • Actual
    • K(C);P-FLIGHT,P_SPINR(I),P_SPINS(F)
    • Threat
      • DUALS(2)
    • Vars
      • Q(h);CHECK,XR(I)::QAR(B)+P(D)
      • R(c);CHECK,XS(F)::QAR(B)+P(D)
      • S(b);N_GUARD::R1(A),XS(b)
      • Q(h);N_GUARD,N_PINR(I)::QAB(B)
      • Q(h);N_GUARD,N_PINR(I)::QAB(B),XQ(h)
      • S(b);N_GUARD,N_PINS(F)::R1(A)
      • S(e);N_PINS(F)::S(F)
      • S(e);N_PINR(I)::R1(I)
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