MESON Chess Problem Database

Problem Display
PID: 94616 (4r2r/3Q4/4n3/5k1b/4qP1B/4PN1P/2NK4/1B6 w - - 0 1)

Rowland, Thomas B

Sussex Chess Magazine, 1883

4r2r/3Q4/4n3/5k1b/4qP1B/4PN1P/2NK4/1B6

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc2+
      • 2.Bxc2#
    • 1...Qd3+
      • 2.Qxd3#
    • 1...Qxf3
      • 2.Sd4#
    • 1...Qd5+
      • 2.Scd4#
    • 1...Qc6
      • 2.Scd4#
    • 1...Qb7
      • 2.Scd4#
    • 1...Qa8
      • 2.Scd4#
    • 1...Qa4
      • 2.Scd4#
    • 1...Qb4+
      • 2.Sxb4#
    • 1...Qc4
      • 2.Scd4#
    • 1...Qd4+
      • 2.Scxd4#
    • 1...Qxf4
      • 2.Scd4#
    • 1...Qe5
      • 2.Scd4#
    • 1...Bxf3
      • 2.Qf7#
    • 1...Bg4
      • 2.Qf7#
    • 1...Bg6
      • 2.Scd4#
    • 1...Bf7
      • 2.Qxf7#
  • Tries
    • 1.Sfd4+?
      • 1...Qxd4+
        • 2.Sxd4#
      • 1...Kg6!
    • 1.Qd5+?
      • 1...Qxd5+
        • 2.Scd4#
      • 1...Qe5
        • 2.Sa1#
        • 2.Sce1#
        • 2.Sa3#
        • 2.Sb4#
        • 2.Scd4#
      • 1...Kg6!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Sh4#
      • 1...Qxc2+
        • 2.Bxc2#
      • 1...Qd3+
        • 2.Qxd3#
      • 1...Qd5+
        • 2.Scd4#
      • 1...Qxe3+
        • 2.Sxe3#
      • 1...Qb4+
        • 2.Sxb4#
      • 1...Qd4+
        • 2.Scxd4#
      • 1...Kg6
        • 2.Sh4#
      • 1...Qxf3
        • 2.Sd4#
      • 1...Qxf4
        • 2.Scd4#
      • 1...Bxf3
        • 2.Qf7#
      • 1...Qc6
        • 2.Scd4#
      • 1...Qb7
        • 2.Scd4#
      • 1...Qa8
        • 2.Scd4#
      • 1...Qa4
        • 2.Scd4#
      • 1...Qc4
        • 2.Scd4#
      • 1...Qe5
        • 2.Scd4#
      • 1...Bg4
        • 2.Qf7#
      • 1...Bg6
        • 2.Scd4#
      • 1...Bf7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,OGATE,P_SPINQ(a),XS(B)::B(A),XQ(a)
    • Q(a);CHECK,OGATEB::QAB(I),XQ(a)
    • Q(a);XS(E)::B(A)+S(B),DCHECK
    • Q(a);CHECK::B(A)+S(B),DCHECK
    • Q(a);::B(A)+S(B),DCHECK
    • Q(a);CHECK::B(A)+S(B),XQ(a)
    • Q(a);CHECK::B(A)+S(B),DCHECK,XQ(a)
    • Q(a);P_PINP(D),XP(G)::B(A)+S(B),DCHECK
    • B(c);N_GUARD,XS(E)::QAR2(I)
    • B(c);N_GUARD::QAR2(I)
    • B(c);SBLOCK::S(B)
    • B(c);N_GUARD::QAR2(I),XB(c)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • Q(a);CHECK,XS(E)::B(A)+S(B),DCHECK,XQ(a)
      • Refutation
        • K(b);N_SPINS(d),S_FLIGHT
    • Try
      • Q(I);CHECK,N_PINS(d)
      • Vars
        • Q(a);CHECK,XQ(I)::B(A)+S(B),DCHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(H);
    • Threat
      • S(E)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(B)::B(A),XQ(a)
      • Q(a);CHECK,OGATEB::QAB(I),XQ(a)
      • Q(a);CHECK::B(A)+S(B),DCHECK
      • Q(a);CHECK,XP(D)::B(A)+S(B),DCHECK,XQ(a)
      • Q(a);CHECK::B(A)+S(B),XQ(a)
      • Q(a);CHECK::B(A)+S(B),DCHECK,XQ(a)
      • K(b);N_SPINS(d),S_FLIGHT::S(E)
      • Q(a);XS(E)::B(A)+S(B),DCHECK
      • Q(a);P_PINP(D),XP(G)::B(A)+S(B),DCHECK
      • B(c);N_GUARD,XS(E)::QAR2(I)
      • Q(a);::B(A)+S(B),DCHECK
      • B(c);N_GUARD::QAR2(I)
      • B(c);SBLOCK::S(B)
      • B(c);N_GUARD::QAR2(I),XB(c)
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