MESON Chess Problem Database
Problem Display
PID: 137620 (8/8/n1B1p3/P3q2p/1Pk5/KNp2Qn1/1PNR4/5b2 w - - 0 1)
Gandy, Jean-Claude
La Cle, 1970
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Qd4
- 2.Rxd4#
- 1...Qf4
- 2.Qxc3#
- 1...Qd6
- 2.Se3#
- 2.Qxc3#
- 1...Qf6
- 2.Se3#
- 1...Qc7
- 2.Se3#
- 2.Rd4#
- 2.Qxc3#
- 1...Qg7
- 2.Se3#
- 1...Qb8
- 2.Se3#
- 2.Rd4#
- 2.Qxc3#
- 1...Qh8
- 2.Se3#
- 1...Qe1
- 2.Rd4#
- 2.Qxc3#
- 1...Qe2
- 2.Rd4#
- 2.Qxc3#
- 1...Qe3
- 2.Sxe3#
- 1...Qe4
- 2.Qxc3#
- 1...Qxa5+
- 2.Sxa5#
- 1...Qb5
- 2.Se3#
- 2.Rd4#
- 2.Qxc3#
- 1...Qc5
- 2.Qxc3#
- 1...Qd5
- 2.Se3#
- 2.Qxc3#
- 1...Qf5
- 2.Se3#
- 2.Rd4#
- 2.Qxc3#
- 1...Qg5
- 2.Rd4#
- 2.Qxc3#
- 1...Bg2
- 2.Qd3#
- 1...Bd3
- 2.Qxd3#
- 1...Bh3
- 2.Qd3#
- 1...Se2
- 2.Qd3#
- 1...Se4
- 2.Se3#
- 2.Qxf1#
- 1...cxd2
- 2.Sxd2#
- 1...Qd4
- Tries
- 1.Ka4?
- threat
- 2.Sa3#
- 1...Qxa5+
- 2.Sxa5#
- 1...Qb5+
- 2.Bxb5#
- 1...Sc5+!
- threat
- 1.Sbd4?
- threat
- 2.Qxc3#
- 2.b3#
- 1...Qxd4
- 2.Rxd4#
- 2.b3#
- 1...Sxb4
- 2.Qxc3#
- 1...cxb2
- 2.Qb3#
- 1...cxd2
- 2.Qb3#
- 2.Qc3#
- 2.b3#
- 1...Qe3
- 2.Sxe3#
- 2.Bb5#
- 2.b3#
- 1...Bd3
- 2.Qxd3#
- 2.b3#
- 1...Se2
- 2.Qd3#
- 2.b3#
- 1...Se4
- 2.Se3#
- 2.Qxf1#
- 2.b3#
- 1...Sc5
- 2.Bb5#
- 2.Qxc3#
- 1...Qxa5+!
- threat
- 1.Bb5+?
- 1...Qxb5
- 2.Se3#
- 2.Rd4#
- 2.Qxc3#
- 1...Kxb5!
- 1...Qxb5
- 1.Qe4+?
- 1...Qd4
- 2.Se3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Sxe4
- 2.Se3#
- 1...Qxe4!
- 1...Qd4
- 1.Qg4+?
- 1...Qd4
- 2.Se3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Qf4
- 2.Se3#
- 2.Qxe6#
- 1...Qe4
- 2.Se3#
- 1...Se4
- 2.Se3#
- 1...hxg4!
- 1...Qd4
- 1.Qd5+?
- 1...Qxd5
- 2.Se3#
- 1...exd5!
- 1...Qxd5
- 1.Qf4+?
- 1...Qd4
- 2.Se3#
- 2.Rxd4#
- 2.Qxd4#
- 1...Qe4
- 2.Se3#
- 1...Se4
- 2.Se3#
- 2.Qxf1#
- 1...Qxf4!
- 1...Qd4
- 1.Ka4?
- Keys
- 1.Scd4!
- threat
- 2.Qxc3#
- 1...Qxa5+
- 2.Sxa5#
- 1...Qxd4
- 2.Rxd4#
- 1...cxb2
- 2.Rc2#
- 1...cxd2
- 2.Qc3#
- 1...Qe3
- 2.Bb5#
- 1...Bd3
- 2.Qxd3#
- 1...Se2
- 2.Qd3#
- 1...Se4
- 2.Qxf1#
- 1...c2
- 2.Rxc2#
- 2.Qc3#
- threat
- 1.Scd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- Q(e);N_GUARD::R1(C),XQ(e)
- Q(e);N_GUARD::QAR1(F),XP(b)
- Q(e);N_GUARD::S(B)
- Q(e);N_GUARD::S(B),XQ(e)
- Q(e);CHECK,XP(H)::S(E),XQ(e)
- Q(e);N_GUARD,P_PINP(G)::QAR1(F),XP(b)
- B(a);N_GUARD::QAB1(F)
- B(a);N_GUARD::QAB1(F),XB(a)
- S(c);S_CUTB(a)::QAB1(F)
- P(b);XR(C)::S(E),XP(b)
- Tries
- Try
- K(D);P-FLIGHT
- Threat
- S(B)
- Vars
- Q(e);CHECK,XP(H)::S(E),XQ(e)
- Q(e);CHECK,N_GUARD::B(I),XQ(e)
- Refutation
- S(g);CHECK
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- S(g);XP(G)::QAR1(F),XP(b)
- P(b);OGATE,XP(A)::QAB1(F)
- Refutation
- Q(e);CHECK,XP(H)
- Try
- B(I);CHECK
- Refutation
- K(d);S_FLIGHT,XB(I)
- Try
- Q(F);CHECK
- Vars
- S(c);XQ(F)::S(B)
- Refutation
- Q(e);XQ(F)
- Try
- Q(F);CHECK
- Vars
- Q(e);P_SPINQ(e)::S(B)
- S(c);P_SPINS(c)::S(B)
- Refutation
- P(f);XQ(F)
- Try
- Q(F);CHECK
- Vars
- Q(e);XQ(F)::S(B)
- Refutation
- P(h);XQ(F)
- Try
- Q(F);CHECK
- Vars
- Q(e);P_SPINQ(e)::S(B)
- Refutation
- Q(e);XQ(F)
- Try
- Actual
- S(B);
- Threat
- QAR1(F),XP(b)
- Vars
- Q(e);CHECK,XP(H)::S(E),XQ(e)
- Q(e);OGATE,XS(B)::R1(C),XQ(e)
- P(b);OGATEB,XP(A)::R(C)
- P(b);XR(C)::QAR1(F)
- Q(e);N_GUARD::B(I)
- B(a);N_GUARD::QAB1(F),XB(a)
- S(c);S_CUTB(a)::QAB1(F)
- S(c);N_GUARD,S_CUTQ(e)::QAB(F),XB(a)
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).