MESON Chess Problem Database
Problem Display
PID: 72216 (4BR1K/1N4p1/4k1N1/b2n3R/4n3/Q6p/7q/7b w - - 0 1)
Triggs, D
Chess, 1953
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Re5#
- 1...Qe5
- 2.Rxe5#
- 1...Qd6
- 2.Qxh3#
- 1...Qc7
- 2.Qxh3#
- 1...Qb8
- 2.Qxh3#
- 1...Qa2
- 2.Re5#
- 2.Qxh3#
- 1...Qb2
- 2.Qxh3#
- 1...Qc2
- 2.Re5#
- 2.Qxh3#
- 1...Qd2
- 2.Re5#
- 2.Qxh3#
- 1...Qe2
- 2.Re5#
- 1...Qf2
- 2.Re5#
- 1...Qg2
- 2.Re5#
- 1...Be1
- 2.Sd8#
- 1...Bd2
- 2.Sd8#
- 1...Bc3
- 2.Sd8#
- 1...Bd8
- 2.Sxd8#
- 1...Sg3
- 2.Re5#
- 2.Qd6#
- 1...Sd6
- 2.Sc5#
- 1...Sc3
- 2.Qe7#
- 1...Se3
- 2.Qe7#
- 1...Sf4
- 2.Re5#
- 2.Qe7#
- 1...Sb6
- 2.Sd8#
- 2.Qe7#
- 1...Sf6
- 2.Qe7#
- 1...Sc7
- 2.Sd8#
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...Qg1
- Tries
- 1.Rf4?
- threat
- 2.Sf8#
- 2.Re5#
- 1...Sxf4
- 2.Qe7#
- 1...Qb2
- 2.Sf8#
- 2.Qxh3#
- 1...Bc3
- 2.Sf8#
- 2.Sd8#
- 1...Bb4
- 2.Re5#
- 1...Bc7
- 2.Sf8#
- 1...Sc5
- 2.Re5#
- 1...Sg5
- 2.Qd6#
- 1...Sd6
- 2.Sc5#
- 2.Re5#
- 2.Qxd6#
- 1...Sb4
- 2.Re5#
- 1...Qxf4!
- threat
- 1.Rf6+?
- 1...Sexf6
- 2.Sf8#
- 1...Sdxf6
- 2.Sf8#
- 2.Qe7#
- 1...gxf6
- 2.Sf8#
- 1...Kxf6!
- 1...Sexf6
- 1.Qd6+?
- 1...Sxd6
- 2.Sc5#
- 1...Qxd6!
- 1...Sxd6
- 1.Qg3?
- threat
- 2.Re5#
- 2.Qg4#
- 1...Sxg3
- 2.Re5#
- 1...Qg1
- 2.Re5#
- 2.Qe5#
- 1...Qb2
- 2.Qxh3#
- 2.Qg4#
- 1...Qe2
- 2.Re5#
- 2.Qe5#
- 1...Qf2
- 2.Re5#
- 2.Qe5#
- 1...Qg2
- 2.Re5#
- 2.Qe5#
- 1...Bf3
- 2.Re5#
- 1...Bc3
- 2.Sd8#
- 2.Qg4#
- 1...Bc7
- 2.Qg4#
- 1...Sf2
- 2.Sc5#
- 2.Re5#
- 1...Sg5
- 2.Sc5#
- 2.Qg4#
- 1...Sd6
- 2.Sc5#
- 2.Re5#
- 1...Sef6
- 2.Sc5#
- 2.Re5#
- 1...Se3
- 2.Re5#
- 1...Sdf6
- 2.Re5#
- 1...Se7
- 2.Sf4#
- 2.Re5#
- 1...Qxg3!
- threat
- 1.Rf4?
- Keys
- 1.Qd3!
- threat
- 2.Qxd5#
- 1...Qe5
- 2.Rxe5#
- 1...Qd6
- 2.Qxh3#
- 1...Qa2
- 2.Re5#
- 2.Qxh3#
- 1...Qd2
- 2.Re5#
- 2.Qxh3#
- 1...Sd2
- 2.Qf5#
- 1...Sf2
- 2.Qf5#
- 1...Sec3
- 2.Qf5#
- 1...Sg3
- 2.Re5#
- 1...Sc5
- 2.Qf5#
- 1...Sg5
- 2.Qf5#
- 1...Sd6
- 2.Sc5#
- 1...Sef6
- 2.Qf5#
- 1...Sdc3
- 2.Bd7#
- 2.Qd7#
- 1...Se3
- 2.Bd7#
- 2.Qd7#
- 1...Sb4
- 2.Bd7#
- 2.Qd7#
- 1...Sf4
- 2.Bd7#
- 2.Re5#
- 2.Qd7#
- 1...Sb6
- 2.Sd8#
- 1...Sdf6
- 2.Bf7#
- 1...Sc7
- 2.Sd8#
- 2.Bd7#
- 2.Qd7#
- 1...Se7
- 2.Bd7#
- 2.Qd7#
- threat
- 1.Qd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 8
- REMOVED MATES = 14
- Sets
- Q(b);N_GUARD::R1(B)
- Q(b);N_GUARD::R1(B),XQ(b)
- Q(b);N_GUARD::QAB(A),XP(c)
- B(e);N_GUARD::S(D)
- B(e);N_GUARD::S(D),XB(e)
- S(d);N_GUARD,SBLOCK::S(D)
- S(f);N_GUARD::QAR1(A)
- S(f);N_GUARD::QAR1(A),XS(f)
- Tries
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- S(f);N_GUARD,XR(F)::QAR1(A)
- B(e);::R1(B)
- B(e);::S(C)
- S(d);::R1(B)
- S(d);N_GUARD::QAR1(A)
- S(f);::R1(B)
- Refutation
- Q(b);XR(F)
- Try
- R(F);CHECK
- Vars
- S(d);SBLOCK,XR(F)::S(C)
- P(h);SBLOCK,XR(F)::S(C)
- Refutation
- K(g);P-FLIGHT,XR(F)
- Try
- Q(A);CHECK
- Vars
- S(d);SBLOCK,XQ(A)::S(D)
- Refutation
- Q(b);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(d);XQ(A)::R1(B)
- B(a);::R1(B)
- B(e);::QAB(A)
- S(f);::R1(B)
- Refutation
- Q(b);XQ(A)
- Try
- Actual
- Q(A);
- Threat
- QAB1(A),XS(f)
- Vars
- Q(b);N_GUARD::R1(B),XQ(b)
- Q(b);N_GUARD::QAB(A),XP(c)
- S(d);OGATE::QAB1(A)
- S(d);S_CUTQ(b)::R1(B)
- S(d);N_GUARD,SBLOCK::S(D)
- S(f);S_CUTB(e)::S(D)
- S(f);SBLOCK::B(E)
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).