MESON Chess Problem Database
Problem Display
PID: 222420 (4B3/1p3N2/1Q6/4P2N/4k3/R2n3P/8/3R1K2 w - - 0 1)
Mackenzie, Arthur Ford
2nd Prize, St. John Globe, 1884
#2
9 + 3
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Kf3
- 2.Sg5#
- 1...Sc1
- 2.Qg6#
- 1...Se1
- 2.Qg6#
- 1...Sb2
- 2.Qg6#
- 1...Sf2
- 2.Qg6#
- 1...Sb4
- 2.Qg6#
- 1...Sf4
- 2.Sg3#
- 1...Sc5
- 2.Qg6#
- 1...Sxe5
- 2.Sd6#
- 1...Kf3
- Tries
- 1.Bd7?
- 1...Kf3
- 2.Sg5#
- 1...Sxe5
- 2.Sg5#
- 2.Sd6#
- 2.Rd4#
- 2.Re3#
- 2.Qe3#
- 2.Qd4#
- 1...Sc1
- 2.Rd4#
- 2.Re3#
- 2.Qe3#
- 2.Qd4#
- 2.Qb4#
- 2.Qg6#
- 2.Qxb7#
- 1...Se1
- 2.Rd4#
- 2.Re3#
- 2.Qe3#
- 2.Qd4#
- 2.Qb4#
- 2.Qg6#
- 2.Qxb7#
- 1...Sb2
- 2.Rd4#
- 2.Re3#
- 2.Qe3#
- 2.Qd4#
- 2.Qg6#
- 2.Qxb7#
- 1...Sf2
- 2.Rd4#
- 2.Re3#
- 2.Qe3#
- 2.Qd4#
- 2.Qb4#
- 2.Qg6#
- 2.Qxb7#
- 1...Sb4
- 2.Rd4#
- 2.Re3#
- 2.Qe3#
- 2.Qd4#
- 2.Qxb4#
- 2.Qg6#
- 1...Sf4
- 2.Sg3#
- 2.Sf6#
- 2.Rd4#
- 2.Re3#
- 2.Qe3#
- 2.Qd4#
- 2.Qb4#
- 1...Sc5
- 2.Qb4#
- 2.Qg6#
- 1...Kd5!
- 1...Kf3
- 1.Rc3?
- 1...Kf3
- 2.Sg5#
- 1...Kd5
- 2.Sf6#
- 1...Sxe5
- 2.Sd6#
- 1...Sc1
- 2.Qg6#
- 1...Se1
- 2.Qg6#
- 1...Sb2
- 2.Qg6#
- 1...Sf2
- 2.Qg6#
- 1...Sb4
- 2.Qg6#
- 1...Sf4
- 2.Sg3#
- 1...Sc5
- 2.Qg6#
- 1...Kf5!
- 1...Kf3
- 1.Ra4+?
- 1...Kf3
- 2.Sg5#
- 2.Rxd3#
- 1...Kd5
- 2.Sf4#
- 2.Sf6#
- 2.Rxd3#
- 2.Rd4#
- 2.Qd6#
- 1...Kf5
- 2.Sg3#
- 2.Sg7#
- 2.Bd7#
- 2.Qf6#
- 1...Sb4!
- 1...Kf3
- 1.Qd4+?
- 1...Kf3
- 2.Sg5#
- 2.Rdxd3#
- 2.Raxd3#
- 2.Qxd3#
- 2.Qf4#
- 1...Kf5
- 2.Qg4#
- 1...Kxd4!
- 1...Kf3
- 1.Qb4+?
- 1...Ke3
- 2.Rdxd3#
- 2.Raxd3#
- 2.Qf4#
- 1...Kf3
- 2.Rdxd3#
- 2.Raxd3#
- 2.Qf4#
- 1...Kd5
- 2.Sf4#
- 1...Kf5
- 2.Qg4#
- 1...Sxb4!
- 1...Ke3
- 1.Qc6+?
- 1...Ke3
- 2.Rdxd3#
- 2.Raxd3#
- 1...Kd4
- 2.Rdxd3#
- 2.Raxd3#
- 1...Kf5
- 2.Bd7#
- 1...bxc6!
- 1...Ke3
- 1.Qd6?
- threat
- 2.Qxd3#
- 1...Ke3
- 2.Qxd3#
- 1...Kf3
- 2.Qxd3#
- 1...Sxe5
- 2.Qxe5#
- 1...Sc1
- 2.Qg6#
- 1...Se1
- 2.Qg6#
- 1...Sb2
- 2.Qg6#
- 1...Sf2
- 2.Qg6#
- 1...Sb4
- 2.Qg6#
- 1...Sf4
- 2.Sg3#
- 1...Sc5
- 2.Qg6#
- 1...Kf5!
- threat
- 1.Bd7?
- Keys
- 1.Bb5!
- 1...Kf3
- 2.Sg5#
- 1...Kd5
- 2.Sf6#
- 1...Kf5
- 2.Bxd3#
- 1...Sxe5
- 2.Sd6#
- 1...Sc1
- 2.Qg6#
- 1...Se1
- 2.Qg6#
- 1...Sb2
- 2.Qg6#
- 1...Sf2
- 2.Qg6#
- 1...Sb4
- 2.Qg6#
- 1...Sf4
- 2.Sg3#
- 1...Sc5
- 2.Qg6#
- 1...Kf3
- 1.Bb5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- K(b);P_SPINS(a),S_FLIGHT::S(H)
- S(a);::QAB(G)
- S(a);SBLOCK::S(F)
- S(a);SBLOCK,XP(E)::S(H)
- Tries
- Try
- B(I);
- Vars
- K(b);P_SPINS(a),S_FLIGHT::S(H)
- Refutation
- K(b);P_SPINS(a),S_FLIGHT
- Try
- R(C);
- Vars
- K(b);P_SPINS(a),S_FLIGHT::S(H)
- K(b);P_SPINS(a),S_FLIGHT::S(F)
- S(a);SBLOCK,XP(E)::S(H)
- S(a);::QAB(G)
- S(a);SBLOCK::S(F)
- Refutation
- K(b);S_FLIGHT
- Try
- R(C);CHECK
- Refutation
- S(a);P_SPINS(a)
- Try
- Q(G);CHECK
- Vars
- K(b);OGATE,S_FLIGHT::QAB1(G)
- Refutation
- K(b);P-FLIGHT,P_SPINS(a),XQ(G)
- Try
- Q(G);CHECK
- Vars
- K(b);P_SPINS(a),S_FLIGHT::S(F)
- K(b);OGATE,S_FLIGHT::QAB1(G)
- Refutation
- S(a);XQ(G)
- Try
- Q(G);CHECK
- Vars
- K(b);S_FLIGHT::B(I)
- Refutation
- P(c);XQ(G)
- Try
- Q(G);
- Threat
- QAB1(G),XS(a)
- Vars
- K(b);P-FLIGHT,P_SPINS(a)::QAR1(G),XS(a)
- K(b);P_SPINS(a),S_FLIGHT::QAR2(G),XS(a)
- S(a);OGATE,XP(E)::QAR1(G),XS(a)
- S(a);::QAB(G)
- S(a);SBLOCK::S(F)
- Refutation
- K(b);S_FLIGHT
- Try
- Actual
- B(I);
- Vars
- K(b);P_SPINS(a),S_FLIGHT::S(H)
- K(b);P_SPINS(a),S_FLIGHT::S(F)
- K(b);S_FLIGHT::B(I),XS(a)
- S(a);SBLOCK,XP(E)::S(H)
- S(a);::QAB(G)
- S(a);SBLOCK::S(F)
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).