MESON Chess Problem Database
Problem Display
PID: 80439 (1Q1br3/3qp3/4R3/2kN4/R2p4/KPNnnB2/2b5/8 w - - 0 1)
Savournin, Jacques
Comm., SEPA-40 and Arguelles-75 JT, 1978
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxa4+
- 2.Sxa4#
- 1...Qb5
- 2.Qxb5#
- 1...Qc8
- 2.Qb5#
- 1...Qxd5
- 2.Qb5#
- 1...Qd6
- 2.Qb5#
- 1...Qa7
- 2.Qb5#
- 1...Qc7
- 2.Qb5#
- 1...Bb6
- 2.Qxb6#
- 1...Sc1
- 2.Qb4#
- 1...Se1
- 2.Qb4#
- 1...Sb2
- 2.Qb4#
- 1...Sf2
- 2.Qb4#
- 1...Sb4
- 2.Qxb4#
- 1...Sf4
- 2.Qb4#
- 1...Se5
- 2.Qb4#
- 1...Sd1
- 2.Rc4#
- 1...Sf1
- 2.Rc4#
- 1...Sg2
- 2.Rc4#
- 1...Sc4+
- 2.Rxc4#
- 1...Sg4
- 2.Rc4#
- 1...Sxd5
- 2.Se4#
- 2.Rc4#
- 1...Sf5
- 2.Rc4#
- 1...Qxa4+
- Tries
- 1.Sxe3?
- threat
- 2.Se4#
- 2.Rc4#
- 1...Qxa4+
- 2.Sxa4#
- 1...Bxb3
- 2.Se4#
- 1...dxc3
- 2.Rc4#
- 1...dxe3
- 2.Rc4#
- 1...Qb5
- 2.Se4#
- 2.Qxb5#
- 1...Qc6
- 2.Rc4#
- 2.Rxc6#
- 1...Qd5
- 2.Qb5#
- 1...Qd6
- 2.Rc4#
- 2.Qb5#
- 1...Qa7
- 2.Se4#
- 2.Rc6#
- 2.Qb5#
- 1...Qb7
- 2.Rc4#
- 1...Bb6
- 2.Rc4#
- 2.Qxb6#
- 1...Sc1
- 2.Rc4#
- 2.Qb4#
- 2.b4#
- 1...Se1
- 2.Rc4#
- 2.Qb4#
- 2.b4#
- 1...Sb2
- 2.Qb4#
- 2.b4#
- 1...Sf2
- 2.Rc4#
- 2.Qb4#
- 2.b4#
- 1...Sb4
- 2.Qxb4#
- 1...Sf4
- 2.Rc4#
- 2.Qb4#
- 2.b4#
- 1...Se5
- 2.Qb4#
- 2.b4#
- 1...Qxe6!
- threat
- 1.Sc7?
- threat
- 2.Se4#
- 2.Sa6#
- 2.Qa7#
- 2.Qb6#
- 1...Qxa4+
- 2.Sxa4#
- 1...Sc4+
- 2.Rxc4#
- 1...Qxe6
- 2.Sxe6#
- 1...Qxc7
- 2.Qb5#
- 1...dxc3
- 2.Sa6#
- 2.Qa7#
- 2.Qb6#
- 1...Qb5
- 2.Se4#
- 2.Qxb5#
- 1...Qc6
- 2.Rxc6#
- 1...Qc8
- 2.Se4#
- 2.Ra5#
- 2.Rc6#
- 2.Qa7#
- 2.Qb5#
- 2.Qb6#
- 1...Qd5
- 2.Sa6#
- 2.Ra5#
- 2.Qa7#
- 2.Qb5#
- 2.Qb6#
- 1...Qd6
- 2.Ra5#
- 2.Qb5#
- 1...Sc1
- 2.Sa6#
- 2.Qa7#
- 2.Qb4#
- 2.Qb6#
- 1...Se1
- 2.Sa6#
- 2.Qa7#
- 2.Qb4#
- 2.Qb6#
- 1...Sb2
- 2.Sa6#
- 2.Qa7#
- 2.Qb4#
- 2.Qb6#
- 1...Sf2
- 2.Sa6#
- 2.Qa7#
- 2.Qb4#
- 2.Qb6#
- 1...Sb4
- 2.Qa7#
- 2.Qxb4#
- 2.Qb6#
- 1...Sf4
- 2.Sa6#
- 2.Qa7#
- 2.Qb4#
- 2.Qb6#
- 1...Se5
- 2.Sa6#
- 2.Qa7#
- 2.Qb4#
- 2.Qb6#
- 1...Sd5
- 2.Se4#
- 2.Sa6#
- 2.Rc4#
- 1...Bxc7!
- threat
- 1.Ra5+?
- 1...Qb5
- 2.Sa4#
- 2.Rxb5#
- 2.Qxb5#
- 1...Bxa5!
- 1...Qb5
- 1.Qa7+?
- 1...Bb6
- 2.Qxb6#
- 1...Qxa7!
- 1...Bb6
- 1.b4+?
- 1...Sxb4
- 2.Qxb4#
- 1...Kc4!
- 1...Sxb4
- 1.Sxe3?
- Keys
- 1.Sb6!
- threat
- 2.Sxd7#
- 1...Qxa4+
- 2.Sbxa4#
- 1...Sc4+
- 2.Rxc4#
- 1...Qxe6
- 2.Ra5#
- 1...Bxb6
- 2.Qxb6#
- 1...Qb5
- 2.Se4#
- 1...Qc6
- 2.Rxc6#
- 1...Qc8
- 2.Ra5#
- 1...Qd5
- 2.Ra5#
- 1...Qd6
- 2.Ra5#
- 1...Qa7
- 2.Rc6#
- 1...Qb7
- 2.Ra5#
- 1...Qc7
- 2.Ra5#
- 1...Se5
- 2.b4#
- threat
- 1.Sb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 7
- ADDED MATES = 3
- REMOVED MATES = 11
- Sets
- Q(f);CHECK,XR(E)::S(C),XQ(f)
- Q(f);N_GUARD::QAR1(H),XQ(f)
- Q(f);N_GUARD::QAR1(H)
- Q(f);N_GUARD,XS(F)::QAR1(H)
- Q(f);N_GUARD,P_PINR(E)::QAR1(H)
- B(h);N_GUARD::QAB1(H),XB(h)
- S(b);N_GUARD::QAB1(H)
- S(b);N_GUARD::QAB1(H),XS(b)
- S(c);N_GUARD::R1(E)
- S(c);CHECK,N_GUARD::R1(E),XS(c)
- Tries
- Try
- S(F);XS(c)
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK,XR(E)::S(C),XQ(f)
- B(a);XP(B)::S(C)
- P(d);XS(C)::R1(E)
- P(d);XS(F)::R1(E)
- Q(f);N_GUARD::QAR1(H)
- Q(f);::R1(E)
- S(b);N_GUARD::QAB1(H),XS(b)
- Refutation
- Q(f);XR(G)
- Try
- S(F);
- Threat
- DUALS(4)
- Vars
- Q(f);CHECK,XR(E)::S(C),XQ(f)
- S(c);CHECK,N_GUARD::R1(E),XS(c)
- Q(f);XR(G)::S(F),XQ(f)
- Q(f);N_GUARD,XS(F)::QAR1(H)
- Q(f);N_GUARD::R1(G),XQ(f)
- Refutation
- B(h);XS(F)
- Try
- R(E);CHECK
- Refutation
- B(h);XR(E)
- Try
- Q(H);CHECK
- Vars
- B(h);N_GUARD,P_SPINB(h)::QAB1(H),XB(h)
- Refutation
- Q(f);P_PINR(E),XQ(H)
- Try
- P(B);CHECK
- Vars
- S(b);OGATE,XP(B)::QAB1(H),XS(b)
- Refutation
- K(e);P-FLIGHT
- Try
- Actual
- S(F);
- Threat
- S(F),XQ(f)
- Vars
- Q(f);CHECK,XR(E)::S(F),XQ(f)
- S(c);CHECK,N_GUARD::R1(E),XS(c)
- Q(f);N_GUARD,XR(G)::R(E)
- B(h);OGATE,XS(F)::QAB1(H),XB(h)
- Q(f);SBLOCK::S(C)
- Q(f);N_GUARD::R1(G),XQ(f)
- Q(f);N_GUARD::R(E)
- Q(f);N_GUARD,P_PINR(E)::R1(G)
- S(b);N_GUARD::P(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).