MESON Chess Problem Database
Problem Display
PID: 498 (6Rn/5p2/2Np1kbQ/3p1P2/6Pp/5n1P/5N2/7K w - - 0 1)
Maclay, J Neil
The Observer, 1957
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Se1
- 2.Qxh4#
- 1...Sg1
- 2.Qxh4#
- 1...Sd2
- 2.Qxh4#
- 1...Sh2
- 2.Qxh4#
- 1...Sd4
- 2.Qxh4#
- 1...Se5
- 2.Qxh4#
- 1...Sg5
- 2.Qg7#
- 2.Qxh8#
- 1...d4
- 2.Se4#
- 1...Se1
- Tries
- 1.Kg2?
- 1...Sg1
- 2.Qxh4#
- 1...Sd2
- 2.Qxh4#
- 1...Sh2
- 2.Qxh4#
- 1...Sd4
- 2.Qxh4#
- 1...Se5
- 2.Qxh4#
- 1...Sg5
- 2.Qg7#
- 2.Qxh8#
- 1...d4
- 2.Se4#
- 1...Se1+!
- 1...Sg1
- 1.Sd1?
- 1...Se1
- 2.Qxh4#
- 1...Sg1
- 2.Qxh4#
- 1...Sd2
- 2.Qxh4#
- 1...Sh2
- 2.Qxh4#
- 1...Sd4
- 2.Qxh4#
- 1...Se5
- 2.Qxh4#
- 1...Sg5
- 2.Qg7#
- 2.Qxh8#
- 1...d4!
- 1...Se1
- 1.Sd3?
- 1...Se1
- 2.Qxh4#
- 1...Sg1
- 2.Qxh4#
- 1...Sd2
- 2.Qxh4#
- 1...Sh2
- 2.Qxh4#
- 1...Sd4
- 2.Qxh4#
- 1...Se5
- 2.Qxh4#
- 1...Sg5
- 2.Qg7#
- 2.Qxh8#
- 1...d4!
- 1...Se1
- 1.Rd8?
- threat
- 2.Rxd6#
- 1...Sg5
- 2.Qxh8#
- 1...Sd4!
- threat
- 1.Qf8?
- threat
- 2.Qe7#
- 2.Qd8#
- 1...Bxf5
- 2.Qe7#
- 1...Kg5!
- threat
- 1.Qxh4+?
- 1...Sg5
- 2.Qxh8#
- 1...Sxh4!
- 1...Sg5
- 1.Kg2?
- Keys
- 1.Qf4!
- 1...Bxf5
- 2.Qxf5#
- 1...Se1
- 2.g5#
- 1...Bh5
- 2.Qxd6#
- 1...Bh7
- 2.Qxd6#
- 1...Sg1
- 2.g5#
- 1...Sd2
- 2.g5#
- 1...Sh2
- 2.g5#
- 1...Sd4
- 2.g5#
- 1...Se5
- 2.g5#
- 1...Sg5
- 2.Qd4#
- 1...d4
- 2.Se4#
- 1...Bxf5
- 1.Qf4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAB(G),XP(b)
- P(c);N_GUARD::S(B)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- S(a);N_GUARD::QAB(G),XP(b)
- P(c);N_GUARD::S(B)
- Refutation
- S(a);CHECK
- Try
- S(B);
- Vars
- S(a);N_GUARD::QAB(G),XP(b)
- Refutation
- P(c);
- Try
- S(B);
- Vars
- S(a);N_GUARD::QAB(G),XP(b)
- Refutation
- P(c);
- Try
- R(H);
- Threat
- R(H),XP(d)
- Vars
- S(a);SBLOCK::QAB(G),XS(h)
- Refutation
- S(a);
- Try
- Q(G);N_PINB(f),P_PINP(g)
- Threat
- DUALS(2)
- Vars
- B(f);XP(E)::QAB1(G)
- Refutation
- K(e);N_SPINP(g),P_SPINB(f),S_FLIGHT
- Try
- Q(G);CHECK,N_PINB(f),XP(b)
- Vars
- S(a);P_SPINS(a),SBLOCK::QAB(G),XS(h)
- Refutation
- S(a);XQ(G)
- Try
- Actual
- Q(G);N_PINB(f)
- Vars
- B(f);OGATE,P_SPINB(f),XP(E)::QAR1(G),XB(f)
- S(a);N_GUARD::P(D)
- B(f);::QAR2(G),XP(d)
- S(a);N_GUARD,SBLOCK::QAB(G)
- P(c);N_GUARD::S(B)
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).