MESON Chess Problem Database
Problem Display
PID: 222770 (BB3b2/Q5pN/1pppppP1/Rq3k1K/6N1/6P1/8/4R3 w - - 0 1)
Michel, Francois
Monreal, Pierre
US Problem Bulletin, 1964
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...bxa5
- 2.Qf2#
- 1...c5
- 2.Be4#
- 1...e5
- 2.Qd7#
- 1...bxa5
- Tries
- 1.Shxf6?
- threat
- 2.Rf1#
- 1...bxa5
- 2.Qf2#
- 1...e5
- 2.Qd7#
- 1...c5
- 2.Be4#
- 1...d5
- 2.Re5#
- 1...gxf6!
- threat
- 1.Rxb5+?
- 1...cxb5
- 2.Be4#
- 2.Rf1#
- 1...c5
- 2.Be4#
- 2.Rf1#
- 1...e5
- 2.Qd7#
- 1...d5!
- 1...cxb5
- 1.Qxb6?
- threat
- 2.Qf2#
- 1...Qc5
- 2.Qb1#
- 1...c5
- 2.Be4#
- 1...e5!
- threat
- 1.Qf7?
- threat
- 2.Qxe6#
- 1...e5
- 2.Qd7#
- 1...Qe5!
- threat
- 1.Qxg7?
- threat
- 2.Sh6#
- 2.Qxf6#
- 1...e5
- 2.Qxf6#
- 2.Qd7#
- 1...Be7
- 2.Sh6#
- 1...Bxg7!
- threat
- 1.Shxf6?
- Keys
- 1.Sg5!
- threat
- 2.Rf1#
- 1...bxa5
- 2.Qf2#
- 1...fxg5
- 2.Qf7#
- 1...c5
- 2.Be4#
- 1...d5
- 2.Se3#
- 1...e5
- 2.Se3#
- 2.Qd7#
- threat
- 1.Sg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- P(c);N_SPINQ(a),OGATE,XR(D)::QAR(G)
- P(d);N_SPINQ(a),OGATE::B(I)
- P(f);N_SPINQ(a),OGATEB::QAB(G)
- Tries
- Try
- S(H);XP(g)
- Threat
- R(A)
- Vars
- P(c);N_SPINQ(a),OGATE,XR(D)::QAR(G)
- P(f);N_SPINQ(a),OGATEB::QAB(G)
- P(d);N_SPINQ(a),OGATE::B(I)
- P(e);N_GUARD,N_SPINQ(a),S_CUTQ(a)::R1(A)
- Refutation
- P(h);XS(H)
- Try
- R(D);CHECK,XQ(a)
- Vars
- P(f);P_SPINP(f),S_CUTP(d),S_CUTP(d),S_CUTP(e)::QAB(G)
- Refutation
- P(e);P_SPINP(e)
- Try
- Q(G);XP(c)
- Threat
- QAR(G)
- Vars
- Q(a);OGATE::QAB(G)
- P(d);N_SPINQ(a),OGATE::B(I)
- Refutation
- P(f);N_SPINQ(a)
- Try
- Q(G);P_PINP(g)
- Threat
- QAB1(G),XP(f)
- Vars
- P(f);N_SPINQ(a),OGATEB::QAB(G)
- Refutation
- Q(a);
- Try
- Q(G);XP(h)
- Threat
- DUALS(2)
- Vars
- B(i);::S(C)
- Refutation
- B(i);XQ(G)
- Try
- Actual
- S(H);
- Threat
- R(A)
- Vars
- P(c);N_SPINQ(a),OGATE,XR(D)::QAR(G)
- P(g);OGATEB,XS(H)::QAR2(G)
- P(d);N_SPINQ(a),OGATE::B(I)
- P(e);N_SPINQ(a)::S(C)
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).