MESON Chess Problem Database
Problem Display
PID: 136900 (3K4/8/4N1n1/3R1p2/8/4k2N/2Q3P1/1Bb2q2 w - - 0 1)
Lewis, Robert Tony
1st Comm., The Problemist, 1978/I
#2
7 + 5
| 1099 | WCSC | 2010 |
| 133 | The Problemist Supplement | 2011 |
| 15 | British Chess Magazine | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Qe2
- 2.Qc5#
- 1...Qxg2
- 2.Qd3#
- 1...Qd3
- 2.Qxd3#
- 1...Qc4
- 2.Qf2#
- 1...Qb5
- 2.Qf2#
- 1...Qa6
- 2.Qf2#
- 1...Qd1
- 2.Qf2#
- 1...Qe1
- 2.Qd3#
- 1...Qg1
- 2.Qd3#
- 1...Qh1
- 2.Qd3#
- 2.Qf2#
- 1...Qf2
- 2.Qd3#
- 2.Qxf2#
- 1...Qf3
- 2.Qd3#
- 1...Qf4
- 2.Qd3#
- 1...Bb2
- 2.Qd2#
- 1...Bd2
- 2.Qxd2#
- 1...Ba3
- 2.Qd2#
- 1...Sf4
- 2.Re5#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...f4
- 2.Qe4#
- 1...Qe2
- Tries
- 1.Ke8?
- 1...Qxg2
- 2.Qd3#
- 1...Qd3
- 2.Qxd3#
- 1...Bd2
- 2.Qxd2#
- 1...Qe2
- 2.Qc5#
- 1...Qc4
- 2.Qf2#
- 1...Qa6
- 2.Qf2#
- 1...Qd1
- 2.Qf2#
- 1...Qe1
- 2.Qd3#
- 1...Qg1
- 2.Qd3#
- 1...Qh1
- 2.Qd3#
- 2.Qf2#
- 1...Qf2
- 2.Qd3#
- 2.Qxf2#
- 1...Qf3
- 2.Qd3#
- 1...Qf4
- 2.Qd3#
- 1...Bb2
- 2.Qd2#
- 1...Ba3
- 2.Qd2#
- 1...Sf4
- 2.Re5#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...f4
- 2.Qe4#
- 1...Qb5+!
- 1...Qxg2
- 1.Sef4?
- threat
- 2.Qc5#
- 1...Qxg2
- 2.Qb3#
- 2.Qd3#
- 2.Qc3#
- 1...Qxf4
- 2.Qd3#
- 1...Qd3
- 2.Qxd3#
- 1...Qc4
- 2.Qf2#
- 1...Qb5
- 2.Qxc1#
- 2.Qf2#
- 1...Qd1
- 2.Qf2#
- 1...Bb2
- 2.Qd2#
- 1...Ba3
- 2.Qd2#
- 1...Sxf4!
- threat
- 1.Rd3+?
- 1...Qxd3+
- 2.Qxd3#
- 1...Ke4!
- 1...Qxd3+
- 1.Qb3+?
- 1...Qd3
- 2.Qxd3#
- 1...Ke2!
- 1...Qd3
- 1.Qxc1+?
- 1...Ke2
- 2.Sd4#
- 2.Bd3#
- 2.Qd2#
- 1...Qxc1!
- 1...Ke2
- 1.Qc3+?
- 1...Qd3
- 2.Qxd3#
- 1...Ke2!
- 1...Qd3
- 1.Ke8?
- Keys
- 1.Sf2!
- 1...Qxg2
- 2.Rd3#
- 1...Qxf2
- 2.Qd3#
- 1...Qe2
- 2.Qc5#
- 1...Bd2
- 2.Qxd2#
- 1...Qd3
- 2.Rxd3#
- 1...Qc4
- 2.Sd1#
- 1...Qb5
- 2.Sd1#
- 1...Qa6
- 2.Sd1#
- 1...Qd1
- 2.Sxd1#
- 1...Qe1
- 2.Rd3#
- 1...Qg1
- 2.Rd3#
- 1...Qh1
- 2.Rd3#
- 1...Bb2
- 2.Qd2#
- 1...Ba3
- 2.Qd2#
- 1...Sf4
- 2.Re5#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...f4
- 2.Sg4#
- 1...Qxg2
- 1.Sf2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 9
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(b);SBLOCK::QAB(B)
- Q(b);N_GUARD,XP(C)::QAR1(B)
- Q(b);N_GUARD,P_PINR(E)::QAR1(B),XQ(b)
- Q(b);N_GUARD::QAB1(B)
- Q(b);N_GUARD,P_PINR(E)::QAB1(B)
- Q(b);N_GUARD::QAR1(B)
- B(a);N_GUARD::QAB1(B)
- B(a);N_GUARD::QAB1(B),XB(a)
- S(e);N_GUARD::R(E)
- S(e);N_GUARD::R(E),XS(e)
- P(d);N_GUARD::QAR1(B)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- Q(b);N_GUARD,XP(C)::QAR1(B)
- Q(b);N_GUARD::QAR1(B),XQ(b)
- B(a);N_GUARD::QAB1(B),XB(a)
- Q(b);SBLOCK::QAB(B)
- Q(b);N_GUARD::QAB1(B)
- Q(b);N_GUARD::QAR1(B)
- B(a);N_GUARD::QAB1(B)
- S(e);N_GUARD::R(E)
- S(e);N_GUARD::R(E),XS(e)
- P(d);N_GUARD::QAR1(B)
- Refutation
- Q(b);CHECK
- Try
- S(F);
- Threat
- QAB(B)
- Vars
- Q(b);N_GUARD,XS(F)::QAR1(B)
- Q(b);N_GUARD,P_PINR(E)::QAR1(B),XQ(b)
- Q(b);N_GUARD::QAB1(B)
- Q(b);N_GUARD,P_PINR(E)::QAB1(B)
- B(a);N_GUARD::QAB1(B)
- Refutation
- S(e);XS(F)
- Try
- R(E);CHECK
- Vars
- Q(b);CHECK,OGATE,XR(E)::QAR1(B),XQ(b)
- Refutation
- K(c);P-FLIGHT
- Try
- Q(B);CHECK
- Vars
- Q(b);N_GUARD,P_PINR(E),P_SPINQ(b)::QAR1(B),XQ(b)
- Refutation
- K(c);P-FLIGHT
- Try
- Q(B);CHECK,XB(a)
- Refutation
- Q(b);XQ(B)
- Try
- Q(B);CHECK
- Vars
- Q(b);N_GUARD,P_PINR(E),P_SPINQ(b)::QAR1(B),XQ(b)
- Refutation
- K(c);P-FLIGHT
- Try
- Actual
- S(D);
- Vars
- Q(b);N_GUARD,XP(C)::R1(E)
- Q(b);N_GUARD,SBLOCK,XS(D)::QAR1(B)
- Q(b);SBLOCK::QAB(B)
- B(a);N_GUARD::QAB1(B),XB(a)
- Q(b);N_GUARD,P_PINR(E)::R1(E),XQ(b)
- Q(b);N_GUARD::S(D)
- Q(b);N_GUARD,P_PINR(E)::S(D),XQ(b)
- Q(b);N_GUARD::R1(E)
- B(a);N_GUARD::QAB1(B)
- S(e);N_GUARD::R(E)
- S(e);N_GUARD::R(E),XS(e)
- P(d);N_GUARD::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).