MESON Chess Problem Database

Problem Display
PID: 182513 (2rn1N2/B7/2p1B1pr/n3k3/K3b2q/3R1RP1/2N1Q3/8 w - - 0 1)

Dobbs, Gilbert S

British Chess Magazine, 1912

2rn1N2/B7/2p1B1pr/n3k3/K3b2q/3R1RP1/2N1Q3/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8
      • 2.Bxb8#
    • 1...Sxe6
      • 2.Sd7#
    • 1...c5
      • 2.Rd5#
    • 1...g5
      • 2.Rf5#
  • Tries
    • 1.Sa3?
      • threat
        • 2.Qb2#
      • 1...Sxe6
        • 2.Sd7#
      • 1...Rb8
        • 2.Bxb8#
      • 1...Sb3
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Qh2!
    • 1.Bb8+?
      • 1...Rc7
        • 2.Bxc7#
      • 1...Rxb8!
    • 1.Qe1?
      • threat
        • 2.Qc3#
        • 2.Qa1#
      • 1...Sxe6
        • 2.Sd7#
      • 1...Qh1
        • 2.Qc3#
      • 1...Rb8
        • 2.Bxb8#
        • 2.Qc3#
      • 1...Sc4
        • 2.Qc3#
      • 1...Sb3!
    • 1.Qe3?
      • threat
        • 2.Qd4#
      • 1...Sxe6
        • 2.Sd7#
      • 1...c5
        • 2.Rd5#
      • 1...Sb3!
    • 1.Qxe4+?
      • 1...Kxe4
        • 2.Rde3#
        • 2.Rfe3#
      • 1...Qxe4+!
    • 1.gxh4?
      • threat
        • 2.Qh2#
      • 1...Sxe6
        • 2.Sd7#
      • 1...Rxh4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qb2#
      • 1...Bxd3+
        • 2.Sc4#
      • 1...Bxf3+
        • 2.Sg4#
      • 1...Bd5+
        • 2.Sc4#
      • 1...Bf5+
        • 2.Sg4#
      • 1...Sxe6
        • 2.Sd7#
      • 1...Qh2
        • 2.Sg4#
      • 1...Rb8
        • 2.Bxb8#
      • 1...Sb3
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#

This is a version of 182478

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(h);N_GUARD::B(H),XR(h)
    • S(i);SBLOCK,XB(G)::S(I)
    • P(e);N_GUARD::R1(C)
    • P(f);N_GUARD::R1(D)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAB(B)
      • Vars
        • S(i);SBLOCK,XB(G)::S(I)
        • R(h);N_GUARD::B(H),XR(h)
        • S(c);N_GUARD::S(A)
        • S(c);N_GUARD::S(A),XS(c)
      • Refutation
        • Q(b);
    • Try
      • B(H);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::B(H),XR(h)
      • Refutation
        • R(h);XB(H)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(i);SBLOCK,XB(G)::S(I)
        • Q(b);::QAB(B)
        • S(c);::QAB(B)
      • Refutation
        • S(c);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(i);SBLOCK,XB(G)::S(I)
        • P(e);N_GUARD::R1(C)
      • Refutation
        • S(c);
    • Try
      • Q(B);CHECK,P_SPINQ(B),XB(a)
      • Refutation
        • Q(b);CHECK,XQ(B)
    • Try
      • P(E);XQ(b)
      • Threat
        • QAB(B)
      • Vars
        • S(i);SBLOCK,XB(G)::S(I)
      • Refutation
        • R(g);XP(E)
  • Actual
    • S(A);N_PINB(a)
    • Threat
      • QAB(B)
    • Vars
      • B(a);CHECK,XR(C)::QAR(B)+S(A),DCHECK
      • B(a);CHECK,XR(D)::QAR(B)+S(A),DCHECK
      • B(a);CHECK::QAR(B)+S(A),DCHECK
      • S(i);SBLOCK,XB(G)::S(I)
      • Q(b);N_GUARD::S(A)
      • R(h);N_GUARD::B(H),XR(h)
      • S(c);N_GUARD::S(A)
      • S(c);N_GUARD::S(A),XS(c)
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