MESON Chess Problem Database
Problem Display
PID: 22551 (1r6/1n1p4/2p2q2/pN1p4/rk2p3/p1R1Q3/5P1b/K2N1B2 w - - 0 1)
Macleod, Norman Alasdair
Mat, 1985
#2
7 + 12
| 6455 | The Chessboard Adventures of Norman Macleod | 1996 |
SOLUTION
- SOUND
- Sets
- 1...Qxc3+
- 2.Qxc3#
- 1...Qd4
- 2.Qxd4#
- 1...Qh4
- 2.Rb3#
- 2.Qd4#
- 1...Qg5
- 2.Rb3#
- 2.Qd4#
- 1...Qe7
- 2.Rb3#
- 2.Qd4#
- 1...Qd8
- 2.Rb3#
- 2.Qd4#
- 1...Qxf2
- 2.Rb3#
- 1...Qf3
- 2.Rb3#
- 2.Qd4#
- 1...Qf4
- 2.Rb3#
- 2.Qd4#
- 1...Qf5
- 2.Rb3#
- 2.Qd4#
- 1...Qd6
- 2.Rb3#
- 2.Qd4#
- 1...Qe6
- 2.Rb3#
- 2.Qd4#
- 1...Qg6
- 2.Rb3#
- 2.Qd4#
- 1...Qh6
- 2.Rb3#
- 2.Qd4#
- 1...Qf7
- 2.Rb3#
- 2.Qd4#
- 1...Qf8
- 2.Rb3#
- 2.Qd4#
- 1...Sc5
- 2.Qxc5#
- 1...Sd6
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...Qxc3+
- Tries
- 1.Sd4?
- threat
- 2.Sc2#
- 1...Qxd4
- 2.Qxd4#
- 1...Qxf2!
- threat
- 1.Sd6?
- threat
- 2.Qb6#
- 1...Qxc3+
- 2.Qxc3#
- 1...Qxf2
- 2.Rb3#
- 1...Sxd6
- 2.Qc5#
- 1...d4
- 2.Rc4#
- 1...Qd4
- 2.Qxd4#
- 1...Qd8
- 2.Rb3#
- 2.Qd4#
- 1...Sc5
- 2.Qxc5#
- 1...Sd8
- 2.Qc5#
- 1...c5!
- threat
- 1.Sc7?
- threat
- 2.Sa6#
- 2.Qb6#
- 1...Qxc3+
- 2.Qxc3#
- 1...Qxf2
- 2.Sa6#
- 2.Rb3#
- 1...d4
- 2.Sa6#
- 2.Rc4#
- 1...Qd4
- 2.Sa6#
- 2.Qxd4#
- 1...Ra8
- 2.Qb6#
- 1...Sc5
- 2.Qxc5#
- 1...Sd6
- 2.Sa6#
- 2.Qc5#
- 1...Sd8
- 2.Sa6#
- 2.Qc5#
- 1...c5
- 2.Sxd5#
- 1...Bxc7!
- threat
- 1.Qxe4+?
- 1...Qd4
- 2.Qb1#
- 2.Qxd4#
- 1...d4
- 2.Qb1#
- 1...dxe4!
- 1...Qd4
- 1.Sd4?
- Keys
- 1.Qb6!
- threat
- 2.Sxa3#
- 2.Sd4#
- 2.Sd6#
- 2.Sa7#
- 2.Sc7#
- 1...Qxc3+
- 2.Sbxc3#
- 1...Qxf2
- 2.Sd4#
- 1...cxb5
- 2.Qxb5#
- 1...d4
- 2.Sxa3#
- 2.Sxd4#
- 2.Sd6#
- 2.Sa7#
- 2.Sc7#
- 1...Qd4
- 2.Sxd4#
- 2.Qxd4#
- 1...Qd8
- 2.Sc7#
- 2.Qd4#
- 1...Qd6
- 2.Sxa3#
- 2.Sd4#
- 2.Sxd6#
- 2.Sa7#
- 2.Sc7#
- 2.Qd4#
- 1...Bd6
- 2.Sxa3#
- 2.Sd4#
- 2.Sxd6#
- 2.Sa7#
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Sc5
- 2.Qxc5#
- 1...Sd6
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...a2
- 2.Sa3#
- 2.Sd4#
- 2.Sd6#
- 2.Sa7#
- 2.Sc7#
- 1...c5
- 2.Sd6#
- 1...d6
- 2.Sxa3#
- 2.Sd4#
- 2.Sxd6#
- 2.Sa7#
- 2.Sc7#
- threat
- 1.Qb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- Q(i);CHECK,OGATE,XR(E)::QAB1(F),XQ(i)
- Q(i);N_GUARD::QAR2(F),XQ(i)
- Q(i);N_PINR(E),XP(D)::R1(E)
- S(j);N_GUARD::QAB1(F),XS(j)
- S(j);N_GUARD::QAB1(F)
- Tries
- Try
- S(G);N_SPINR(E)
- Threat
- S(G)
- Vars
- Q(i);OGATE,P_PINR(E),XS(G)::QAR2(F),XQ(i)
- Refutation
- Q(i);XP(D)
- Try
- S(G);
- Threat
- QAR2(F)
- Vars
- Q(i);CHECK,OGATE,XR(E)::QAB1(F),XQ(i)
- Q(i);N_PINR(E),XP(D)::R1(E)
- S(j);N_GUARD,XS(G)::QAB1(F)
- P(g);N_PINR(E)::R1(E)
- Q(i);N_GUARD::QAR2(F),XQ(i)
- S(j);N_GUARD::QAB1(F),XS(j)
- S(j);N_GUARD::QAB1(F)
- Refutation
- P(h);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(i);CHECK,OGATE,XR(E)::QAB1(F),XQ(i)
- R(l);::QAR2(F)
- S(j);N_GUARD::QAB1(F),XS(j)
- P(h);N_GUARD::S(G),XP(g)
- Refutation
- B(a);XS(G)
- Try
- Q(F);CHECK,XP(e)
- Vars
- P(g);N_PINR(E),P_SPINP(g)::QAR(F)
- Refutation
- P(g);XQ(F)
- Try
- Actual
- Q(F);
- Threat
- DUALS(5)
- Vars
- Q(i);CHECK,XR(E)::QAR(F)+S(G),XQ(i)
- Q(i);N_PINR(E),XP(D)::QAR(F)+S(G)
- P(h);OGATE,P_SPINP(h),XS(G)::QAR1(F),XP(h)
- B(a);::QAR(F)+S(G),XB(a)
- S(j);N_GUARD::QAB1(F),XS(j)
- S(j);N_GUARD::QAB1(F)
- P(h);::QAR(F)+S(G)
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).