MESON Chess Problem Database

Problem Display
PID: 230203 (6n1/5p2/1p2pP2/pP3p2/R1pB1kbQ/R1Np4/P1PN1p1P/5K1n w - - 0 1)

Lawton, Howard

Southend Times, 1938

(First published on Fri Apr 1 1938)

6n1/5p2/1p2pP2/pP3p2/R1pB1kbQ/R1Np4/P1PN1p1P/5K1n

#2

12 + 12

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3+
      • 2.hxg3#
    • 1...Sxf6
      • 2.Qh6#
    • 1...Sh6
      • 2.Qxh6#
    • 1...Se7
      • 2.Qh6#
    • 1...dxc2
      • 2.Se2#
    • 1...e5
      • 2.Sd5#
  • Tries
    • 1.Sce4?
      • threat
        • 2.Qg5#
      • 1...Sg3+
        • 2.Qxg3#
        • 2.hxg3#
      • 1...fxe4!
    • 1.Be3+?
      • 1...Ke5
        • 2.Sxc4#
      • 1...Kxe3!
    • 1.Rb3?
      • 1...Sg3+
        • 2.hxg3#
      • 1...Sxf6
        • 2.Qh6#
      • 1...dxc2
        • 2.Se2#
      • 1...Sh6
        • 2.Qxh6#
      • 1...Se7
        • 2.Qh6#
      • 1...e5
        • 2.Sd5#
      • 1...cxb3!
    • 1.Rxc4?
      • 1...Sg3+
        • 2.hxg3#
      • 1...Sxf6
        • 2.Qh6#
      • 1...dxc2
        • 2.Se2#
      • 1...Sh6
        • 2.Qxh6#
      • 1...Se7
        • 2.Qh6#
      • 1...e5
        • 2.Sd5#
      • 1...a4!
    • 1.Rxa5?
      • 1...Sg3+
        • 2.hxg3#
      • 1...Sxf6
        • 2.Qh6#
      • 1...dxc2
        • 2.Se2#
      • 1...Sh6
        • 2.Qxh6#
      • 1...Se7
        • 2.Qh6#
      • 1...e5
        • 2.Sd5#
      • 1...bxa5!
    • 1.cxd3?
      • threat
        • 2.Se2#
      • 1...Sg3+
        • 2.hxg3#
      • 1...cxd3!
  • Keys
    • 1.Sd1!
      • 1...Sg3+
        • 2.hxg3#
      • 1...Sxf6
        • 2.Qh6#
      • 1...dxc2
        • 2.Rf3#
      • 1...Sh6
        • 2.Qxh6#
      • 1...Se7
        • 2.Qh6#
      • 1...c3
        • 2.Bxc3#
      • 1...e5
        • 2.Be3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);CHECK,OGATE::P(E),XS(a)
    • S(l);N_GUARD,XP(L)::QAB(J)
    • S(l);N_GUARD::QAB(J),XS(l)
    • S(l);N_GUARD::QAB(J)
    • P(c);N_GUARD,XP(C)::S(G)
    • P(j);N_GUARD::S(G)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAB1(J)
      • Refutation
        • P(h);XS(G)
    • Try
      • B(I);CHECK,P_PINP(d)
      • Vars
        • K(e);N_SPINB(f),N_SPINP(d),S_FLIGHT::S(D),XP(d)
      • Refutation
        • K(e);N_SPINB(f),N_SPINP(d),S_FLIGHT,XB(I)
    • Try
      • R(F);
      • Vars
        • S(a);CHECK,OGATE::P(E),XS(a)
        • S(l);N_GUARD,XP(L)::QAB(J)
        • P(c);N_GUARD,XP(C)::S(G)
        • S(l);N_GUARD::QAB(J),XS(l)
        • S(l);N_GUARD::QAB(J)
        • P(j);N_GUARD::S(G)
      • Refutation
        • P(d);XR(F)
    • Try
      • R(H);XP(d)
      • Vars
        • S(a);CHECK,OGATE::P(E),XS(a)
        • S(l);N_GUARD,XP(L)::QAB(J)
        • P(c);N_GUARD,XP(C)::S(G)
        • S(l);N_GUARD::QAB(J),XS(l)
        • S(l);N_GUARD::QAB(J)
        • P(j);N_GUARD::S(G)
      • Refutation
        • P(g);
    • Try
      • R(H);XP(g)
      • Vars
        • S(a);CHECK,OGATE::P(E),XS(a)
        • S(l);N_GUARD,XP(L)::QAB(J)
        • P(c);N_GUARD,XP(C)::S(G)
        • S(l);N_GUARD::QAB(J),XS(l)
        • S(l);N_GUARD::QAB(J)
        • P(j);N_GUARD::S(G)
      • Refutation
        • P(i);XR(H)
    • Try
      • P(C);XP(c)
      • Threat
        • S(G)
      • Vars
        • S(a);CHECK,OGATE::P(E),XS(a)
      • Refutation
        • P(d);XP(C)
  • Actual
    • S(G);
    • Vars
      • S(a);CHECK,OGATE::P(E),XS(a)
      • S(l);N_GUARD,XP(L)::QAB(J)
      • P(c);OGATE,XP(C)::R1(F)
      • S(l);N_GUARD::QAB(J),XS(l)
      • S(l);N_GUARD::QAB(J)
      • P(d);OGATEB::R(H)+B(I),XP(d)
      • P(j);SBLOCK::B(I)
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