MESON Chess Problem Database
Problem Display
PID: 184418 (6NQ/8/2p3p1/2R1p1Pn/3P1k1p/2Nn3B/3K1BP1/8 w - - 0 1)
Knott, Hubert Edward
British Chess Magazine, 1916
#2
10 + 7
SOLUTION
- SOUND
- Sets
- 1...Kxg5
- 2.Qh6#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sxf2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sxc5
- 2.Qxe5#
- 1...Sg3
- 2.Be3#
- 2.Qxh4#
- 1...Sf6
- 2.Qxf6#
- 1...Sg7
- 2.Qxh4#
- 1...exd4
- 2.Qxd4#
- 1...e4
- 2.Se2#
- 1...Kxg5
- Tries
- 1.Kxd3?
- threat
- 2.Qxe5#
- 1...Kxg5
- 2.Qxe5#
- 2.Qh6#
- 1...exd4
- 2.Se2#
- 2.Qxd4#
- 2.Qe5#
- 1...Sf6
- 2.Qxf6#
- 1...Sg7
- 2.Qxh4#
- 1...e4+!
- threat
- 1.Se2+?
- 1...Kxg5
- 2.Qh6#
- 1...Ke4!
- 1...Kxg5
- 1.Se7?
- 1...Sxf2
- 2.Qxe5#
- 1...Sxc5
- 2.Qxe5#
- 1...exd4
- 2.Sxg6#
- 2.Qxd4#
- 1...Sf6
- 2.Qxf6#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sg3
- 2.Be3#
- 2.Qxh4#
- 1...Sg7
- 2.Qxh4#
- 1...e4
- 2.Se2#
- 2.Sxg6#
- 1...Kxg5!
- 1...Sxf2
- 1.Be6?
- 1...Kxg5
- 2.Qh6#
- 1...Sxf2
- 2.Qxe5#
- 1...Sxc5
- 2.Qxe5#
- 1...exd4
- 2.Qxd4#
- 1...Sf6
- 2.Qxf6#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sg3
- 2.Be3#
- 2.Qxh4#
- 1...Sg7
- 2.Qxh4#
- 1...e4
- 2.Se2#
- 1...h3!
- 1...Kxg5
- 1.Bd7?
- 1...Kxg5
- 2.Qh6#
- 1...Sxf2
- 2.Qxe5#
- 1...Sxc5
- 2.Qxe5#
- 1...exd4
- 2.Qxd4#
- 1...Sf6
- 2.Qxf6#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sg3
- 2.Be3#
- 2.Qxh4#
- 1...Sg7
- 2.Qxh4#
- 1...e4
- 2.Se2#
- 1...h3!
- 1...Kxg5
- 1.Bc8?
- 1...Kxg5
- 2.Qh6#
- 1...Sxf2
- 2.Qxe5#
- 1...Sxc5
- 2.Qxe5#
- 1...exd4
- 2.Qxd4#
- 1...Sf6
- 2.Qxf6#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sg3
- 2.Be3#
- 2.Qxh4#
- 1...Sg7
- 2.Qxh4#
- 1...e4
- 2.Se2#
- 1...h3!
- 1...Kxg5
- 1.Ra5?
- 1...Kxg5
- 2.Qh6#
- 1...Sxf2
- 2.Qxe5#
- 1...exd4
- 2.Qxd4#
- 1...Sf6
- 2.Qxf6#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sc5
- 2.Qxe5#
- 1...Sg3
- 2.Be3#
- 2.Qxh4#
- 1...Sg7
- 2.Qxh4#
- 1...e4
- 2.Se2#
- 1...c5!
- 1...Kxg5
- 1.Rxe5?
- threat
- 2.Se2#
- 1...Sxe5
- 2.Qxe5#
- 1...Sg3
- 2.Be3#
- 2.Qxh4#
- 1...Sc1!
- threat
- 1.Qg7?
- 1...Kxg5
- 2.Qh6#
- 1...Sxf2
- 2.Qxe5#
- 1...Sxc5
- 2.Qxe5#
- 1...exd4
- 2.Qxd4#
- 1...Sf6
- 2.Qxf6#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sg3
- 2.Be3#
- 1...e4
- 2.Se2#
- 1...Sxg7!
- 1...Kxg5
- 1.Kxd3?
- Keys
- 1.Be1!
- 1...Kxg5
- 2.Qh6#
- 1...Sxe1
- 2.Qxe5#
- 1...Sxc5
- 2.Qxe5#
- 1...exd4
- 2.Qxd4#
- 1...Sf2
- 2.Qxe5#
- 1...Sf6
- 2.Qxf6#
- 1...Sc1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sg3
- 2.Qxh4#
- 1...Sg7
- 2.Qxh4#
- 1...e4
- 2.Se2#
- 1...Kxg5
- 1.Be1!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- K(b);OGATEB,P_SPINP(d),S_FLIGHT,XP(H)::QAB1(J)
- S(a);N_GUARD::QAB1(J),XP(d)
- S(a);N_GUARD,XB(B)::QAB1(J),XP(d)
- S(a);N_GUARD,XR(G)::QAB1(J),XP(d)
- S(e);N_GUARD::QAR2(J),XS(e)
- S(e);OGATE::QAR2(J),XP(c)
- P(d);OGATE,XP(F)::QAR2(J),XP(d)
- P(d);SBLOCK::S(D)
- Tries
- Try
- K(A);P-FLIGHT,XS(a)
- Threat
- QAB1(J),XP(d)
- Vars
- S(e);N_GUARD::QAR2(J),XS(e)
- S(e);OGATE::QAR2(J),XP(c)
- Refutation
- P(d);CHECK
- Try
- S(D);CHECK
- Vars
- K(b);P_SPINP(d),S_FLIGHT,XP(H)::QAB1(J)
- Refutation
- K(b);P-FLIGHT
- Try
- S(I);
- Vars
- S(a);N_GUARD,XB(B)::QAB1(J),XP(d)
- S(a);N_GUARD,XR(G)::QAB1(J),XP(d)
- S(e);N_GUARD::QAR2(J),XS(e)
- S(a);N_GUARD::QAB1(J),XP(d)
- S(e);OGATE::QAR2(J),XP(c)
- Refutation
- K(b);P_SPINP(d),S_FLIGHT,XP(H)
- Try
- B(E);
- Vars
- K(b);OGATEB,P_SPINP(d),S_FLIGHT,XP(H)::QAB1(J)
- S(a);N_GUARD,XB(B)::QAB1(J),XP(d)
- S(a);N_GUARD,XR(G)::QAB1(J),XP(d)
- P(d);OGATE,XP(F)::QAR2(J),XP(d)
- S(e);N_GUARD::QAR2(J),XS(e)
- S(a);N_GUARD::QAB1(J),XP(d)
- S(e);OGATE::QAR2(J),XP(c)
- P(d);SBLOCK::S(D)
- Refutation
- P(c);
- Try
- B(E);
- Vars
- K(b);OGATEB,P_SPINP(d),S_FLIGHT,XP(H)::QAB1(J)
- S(a);N_GUARD,XB(B)::QAB1(J),XP(d)
- S(a);N_GUARD,XR(G)::QAB1(J),XP(d)
- P(d);OGATE,XP(F)::QAR2(J),XP(d)
- S(e);N_GUARD::QAR2(J),XS(e)
- S(a);N_GUARD::QAB1(J),XP(d)
- S(e);OGATE::QAR2(J),XP(c)
- P(d);SBLOCK::S(D)
- Refutation
- P(c);
- Try
- B(E);
- Vars
- K(b);OGATEB,P_SPINP(d),S_FLIGHT,XP(H)::QAB1(J)
- S(a);N_GUARD,XB(B)::QAB1(J),XP(d)
- S(a);N_GUARD,XR(G)::QAB1(J),XP(d)
- P(d);OGATE,XP(F)::QAR2(J),XP(d)
- S(e);N_GUARD::QAR2(J),XS(e)
- S(a);N_GUARD::QAB1(J),XP(d)
- S(e);OGATE::QAR2(J),XP(c)
- P(d);SBLOCK::S(D)
- Refutation
- P(c);
- Try
- R(G);
- Vars
- K(b);OGATEB,P_SPINP(d),S_FLIGHT,XP(H)::QAB1(J)
- S(a);N_GUARD,XB(B)::QAB1(J),XP(d)
- P(d);OGATE,XP(F)::QAR2(J),XP(d)
- S(e);N_GUARD::QAR2(J),XS(e)
- S(a);N_GUARD::QAB1(J),XP(d)
- S(e);OGATE::QAR2(J),XP(c)
- P(d);SBLOCK::S(D)
- Refutation
- P(f);
- Try
- R(G);XP(d)
- Threat
- S(D)
- Vars
- S(a);OGATE,XR(G)::QAB1(J),XS(a)
- Refutation
- S(a);
- Try
- Q(J);
- Vars
- K(b);OGATEB,P_SPINP(d),S_FLIGHT,XP(H)::QAB1(J)
- S(a);N_GUARD,XB(B)::QAB1(J),XP(d)
- S(a);N_GUARD,XR(G)::QAB1(J),XP(d)
- P(d);OGATE,XP(F)::QAR2(J),XP(d)
- S(e);N_GUARD::QAR2(J),XS(e)
- S(a);N_GUARD::QAB1(J),XP(d)
- S(e);SBLOCK::B(B)
- P(d);SBLOCK::S(D)
- Refutation
- S(e);XQ(J)
- Try
- Actual
- B(B);
- Vars
- K(b);OGATEB,P_SPINP(d),S_FLIGHT,XP(H)::QAB1(J)
- S(a);N_GUARD,XB(B)::QAB1(J),XP(d)
- S(a);N_GUARD,XR(G)::QAB1(J),XP(d)
- P(d);OGATE,XP(F)::QAR2(J),XP(d)
- S(a);N_GUARD::QAB1(J),XP(d)
- S(e);N_GUARD::QAR2(J),XS(e)
- S(e);OGATE::QAR2(J),XP(c)
- P(d);SBLOCK::S(D)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).