MESON Chess Problem Database

Problem Display
PID: 87533 (8/3RN3/1p1Pp1KB/2p1k3/p1R1p3/8/1n2Qb2/3q1B1b w - - 0 1)

Gunn, Robert Ivan

Laws, Benjamin Glover

The Problemist, 1929

8/3RN3/1p1Pp1KB/2p1k3/p1R1p3/8/1n2Qb2/3q1B1b

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Qh5#
    • 1...Qb3
      • 2.Qh5#
    • 1...Qa1
      • 2.Qh5#
    • 1...Qb1
      • 2.Qh5#
    • 1...Qe1
      • 2.Qh5#
    • 1...Qxf1
      • 2.Qh5#
    • 1...Qd3
      • 2.Qh5#
    • 1...Qd4
      • 2.Qh5#
    • 1...Qd5
      • 2.Qh5#
    • 1...Qxd6
      • 2.Qh5#
    • 1...Bd4
      • 2.Qh2#
    • 1...e3
      • 2.Bf4#
      • 2.Bg7#
  • Tries
    • 1.Qxd1?
      • threat
        • 2.Sc6#
        • 2.Qh5#
      • 1...Sxc4
        • 2.Sc6#
      • 1...Bf3
        • 2.Sc6#
      • 1...Be3
        • 2.Sc6#
      • 1...Bd4
        • 2.Qh5#
      • 1...Bh4
        • 2.Sc6#
      • 1...Sd3
        • 2.Qh5#
      • 1...e3
        • 2.Bf4#
        • 2.Bg7#
        • 2.Qh5#
      • 1...Sxd1!
    • 1.Qxb2+?
      • 1...Bd4
        • 2.Qh2#
      • 1...Qd4!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Sc6#
      • 1...Kxd4
        • 2.Qxb2#
      • 1...Qxd4
        • 2.Qh5#
      • 1...Bxd4
        • 2.Qh2#
      • 1...cxd4
        • 2.Qb5#
      • 1...e3
        • 2.Bg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(a);N_GUARD::QAR(B)
    • Q(a);N_GUARD,XB(A)::QAR(B)
    • Q(a);N_GUARD,XP(D)::QAR(B)
    • B(d);OGATE::QAB(B)
  • Tries
    • Try
      • Q(B);N_PINP(f),XQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);XR(C)::S(H)
        • B(b);::S(H)
        • B(d);::S(H)
        • B(d);::QAR(B)
        • S(c);::QAR(B)
      • Refutation
        • S(c);XQ(B)
    • Try
      • Q(B);CHECK,N_PINP(f),XS(c)
      • Vars
        • B(d);OGATE,P_SPINB(d)::QAB(B)
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • R(C);
    • Threat
      • S(H)
    • Vars
      • K(h);N_SPINP(f),OGATEB,S_FLIGHT,XR(C)::QAB(B),XS(c)
      • Q(a);N_GUARD,SBLOCK,XR(C)::QAR(B)
      • B(d);OGATE,SBLOCK,XR(C)::QAB(B)
      • P(g);OGATEB,SBLOCK,XR(C)::QAR(B)
      • P(f);::B(F)
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