MESON Chess Problem Database

Problem Display
PID: 147919 (b1n5/B7/BPR4K/3pp3/N2k4/p7/1q1N1P2/Q2R2n1 w - - 0 1)

Howard, Kenneth Samuel

Bristol Times and Mirror, 1927

(First published on Sat Jan 15 1927)

b1n5/B7/BPR4K/3pp3/N2k4/p7/1q1N1P2/Q2R2n1

#2

10 + 8

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Qxc3#
    • 1...Sxb6
      • 2.Bxb6#
    • 1...Sd6
      • 2.b7#
    • 1...Se7
      • 2.b7#
    • 1...a2
      • 2.Qxb2#
    • 1...e4
      • 2.Sf3#
      • 2.Sc4#
  • Tries
    • 1.Sxb2?
      • threat
        • 2.Sd3#
        • 2.Sa4#
      • 1...axb2
        • 2.Qxb2#
        • 2.Qa4#
      • 1...Se2!
    • 1.Sc3?
      • threat
        • 2.Sb3#
        • 2.Sf3#
      • 1...Qxd2+
        • 2.Rxd2#
      • 1...Qxc3
        • 2.Qxc3#
      • 1...e4
        • 2.Sf3#
      • 1...Qc1
        • 2.Se2#
      • 1...Qb3
        • 2.Sxb3#
        • 2.Sf3#
        • 2.Se2#
      • 1...Sf3
        • 2.Sb3#
        • 2.Sxf3#
        • 2.Se2#
      • 1...Bxc6!
    • 1.Rxc8?
      • threat
        • 2.b7#
      • 1...e4
        • 2.Sf3#
        • 2.Sc4#
      • 1...Bb7!
    • 1.Qxa3?
      • threat
        • 2.Qxb2#
        • 2.Qc5#
        • 2.Qd3#
        • 2.Qe3#
      • 1...Qxd2+
        • 2.Qe3#
      • 1...Qxb6
        • 2.Qb2#
        • 2.Qb4#
        • 2.Qa1#
        • 2.Qc3#
        • 2.Qd3#
        • 2.Qe3#
      • 1...e4
        • 2.Sf3#
        • 2.Qxb2#
      • 1...Se2
        • 2.Qc5#
        • 2.Qd3#
        • 2.Qe3#
      • 1...Qa1
        • 2.Qb4#
        • 2.Qc5#
        • 2.Qxa1#
        • 2.Qd3#
        • 2.Qe3#
      • 1...Qc1
        • 2.Qd3#
        • 2.Qe3#
      • 1...Qc3
        • 2.Qxc3#
      • 1...Qb1
        • 2.Qc5#
        • 2.Qc3#
        • 2.Qe3#
      • 1...Qa2
        • 2.Qc5#
        • 2.Qc3#
        • 2.Qd3#
        • 2.Qe3#
      • 1...Qc2
        • 2.Qe3#
      • 1...Qb3
        • 2.Qc5#
      • 1...Qb4
        • 2.Qxb4#
        • 2.Qd3#
        • 2.Qe3#
      • 1...Qb5
        • 2.Qc3#
        • 2.Qe3#
      • 1...Qxa3!
    • 1.b7+?
      • 1...Sb6
        • 2.Bxb6#
      • 1...Sxa7!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Rd3#
      • 1...Qxd2+
        • 2.Re3#
      • 1...Qxb6+
        • 2.Rc6#
      • 1...Qxc3
        • 2.Qxc3#
      • 1...e4
        • 2.Sf3#
      • 1...Qb5
        • 2.Rb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(b);OGATE::QAB1(A),XQ(b)
    • S(h);OGATE,P_SPINS(h),XP(G)::B(J),XS(h)
    • S(h);N_GUARD::B(J)+P(G)
    • P(c);N_GUARD::QAB(A),XQ(b)
  • Tries
    • Try
      • S(E);XQ(b)
      • Threat
        • DUALS(2)
      • Refutation
        • S(a);
    • Try
      • S(E);N_PINQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XS(C)::R(B),XQ(b)
        • Q(b);OGATE,P_SPINQ(b),XS(E)::QAB1(A),XQ(b)
        • P(f);::R(B)+S(C),DCHECK
        • Q(b);P_PINS(C)::QAB(A)+S(E),DCHECK
      • Refutation
        • B(g);XR(H)
    • Try
      • R(H);XS(h)
      • Threat
        • B(J)+P(G)
      • Refutation
        • B(g);
    • Try
      • Q(A);N_PINQ(b),XP(c)
      • Threat
        • DUALS(4)
      • Vars
        • Q(b);CHECK,P_SPINQ(b),XS(C)::QAB1(A)
        • Q(b);N_GUARD::QAB1(A),XQ(b)
        • Q(b);::QAB1(A)
      • Refutation
        • Q(b);XQ(A)
    • Try
      • P(G);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::B(J),XS(h)
      • Refutation
        • S(h);XB(J)
  • Actual
    • R(H);N_PINQ(b)
    • Threat
      • R1(H)
    • Vars
      • Q(b);CHECK,OGATEB,P_SPINQ(b),XS(C)::QAB(A)+R(H)
      • Q(b);CHECK,OGATEB,P_SPINQ(b),XP(G)::QAB(A)+R(H)
      • Q(b);OGATE,P_SPINQ(b),XR(H)::QAB1(A),XQ(b)
      • P(f);SBLOCK::R(B)+S(C),DCHECK
      • Q(b);OGATEB::QAB(A)+R(H)
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