MESON Chess Problem Database
Problem Display
PID: 75553 (4b3/2Q1R1p1/7q/3kNp1p/3n4/r1bP4/3nN3/1R4BK w - - 0 1)
Lennon, Jean
Il Due Mosse, 1962
#2
8 + 10
SOLUTION
- SOUND
- Sets
- 1...Qf4
- 2.Sxf4#
- 1...Qa6
- 2.Sf4#
- 1...Qb6
- 2.Sf4#
- 1...Qd6
- 2.Sf4#
- 1...Qe6
- 2.Sf4#
- 1...Qf6
- 2.Sf4#
- 1...Qg6
- 2.Sf4#
- 1...Qh7
- 2.Sf4#
- 1...Qh8
- 2.Sf4#
- 1...Ra1
- 2.Sxc3#
- 1...Ra2
- 2.Sxc3#
- 1...Ra4
- 2.Sxc3#
- 1...Ra5
- 2.Sxc3#
- 1...Ra6
- 2.Sxc3#
- 1...Ra7
- 2.Sxc3#
- 1...Ra8
- 2.Sxc3#
- 1...S2b3
- 2.Sxc3#
- 1...Sc2
- 2.Qc5#
- 1...Sxe2
- 2.Qc5#
- 1...S4b3
- 2.Sxc3#
- 1...Sf3
- 2.Qc5#
- 1...Sb5
- 2.Qc5#
- 1...Sc6
- 2.Rb5#
- 1...Qf4
- Tries
- 1.Sc4?
- threat
- 2.Re5#
- 1...Sxc4
- 2.dxc4#
- 1...Sxe2
- 2.Qc5#
- 1...Qe3
- 2.Sxe3#
- 2.Sb6#
- 2.Qd6#
- 1...Qf4
- 2.Sxf4#
- 2.Sb6#
- 1...Qd6
- 2.Se3#
- 2.Qxd6#
- 1...Qe6
- 2.Sf4#
- 1...Qf6
- 2.Sf4#
- 2.Se3#
- 1...Sc2
- 2.Qc5#
- 1...S4b3
- 2.Sxc3#
- 1...S4f3
- 2.Qc5#
- 1...Sb5
- 2.Qc5#
- 1...Sc6
- 2.Sb6#
- 2.Rb5#
- 1...Se6
- 2.Sb6#
- 2.Qd6#
- 1...S2f3!
- threat
- 1.Sd7?
- threat
- 2.Re5#
- 2.Qc5#
- 1...Bxd7
- 2.Re5#
- 1...Sxe2
- 2.Rb5#
- 2.Qc5#
- 1...S2f3
- 2.Qc5#
- 1...Qe3
- 2.Sb6#
- 2.Qc5#
- 1...Qf4
- 2.Sxf4#
- 2.Sb6#
- 2.Qc5#
- 1...Qb6
- 2.Sf4#
- 2.Sxb6#
- 2.Re5#
- 1...Qc6
- 2.Sf4#
- 2.Re5#
- 2.Qe5#
- 1...Qe6
- 2.Sf4#
- 2.Qc5#
- 1...Qf6
- 2.Sf4#
- 2.Qc5#
- 1...Ra5
- 2.Sxc3#
- 2.Re5#
- 1...Bb4
- 2.Re5#
- 1...S2b3
- 2.Sxc3#
- 2.Re5#
- 1...Sc4
- 2.Qc5#
- 2.dxc4#
- 1...Se4
- 2.Re5#
- 1...Sc2
- 2.Rb5#
- 2.Qc5#
- 1...S4b3
- 2.Sxc3#
- 1...S4f3
- 2.Rb5#
- 2.Qc5#
- 1...Sb5
- 2.Rxb5#
- 2.Qc5#
- 1...Sc6
- 2.Sb6#
- 2.Rb5#
- 1...Se6
- 2.Sb6#
- 1...Qd6!
- threat
- 1.Rb5+?
- 1...Sxb5
- 2.Qc5#
- 1...Bxb5!
- 1...Sxb5
- 1.Rd7+?
- 1...Ke6
- 2.Qd6#
- 1...Qd6
- 2.Qxd6#
- 1...Bxd7!
- 1...Ke6
- 1.Sc4?
- Keys
- 1.Sf7!
- threat
- 2.Re5#
- 1...Sxe2
- 2.Qc5#
- 1...S2f3
- 2.Qc4#
- 1...Qe3
- 2.Qd6#
- 1...Qf4
- 2.Sxf4#
- 1...Qd6
- 2.Qxd6#
- 1...Qe6
- 2.Sf4#
- 1...Qf6
- 2.Sf4#
- 1...Sc4
- 2.Qxc4#
- 2.dxc4#
- 1...Sc2
- 2.Qc5#
- 1...S4b3
- 2.Sxc3#
- 1...S4f3
- 2.Qc5#
- 1...Sb5
- 2.Qc5#
- 1...Sc6
- 2.Rb5#
- 1...Se6
- 2.Qd6#
- threat
- 1.Sf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 13
- Sets
- Q(h);N_GUARD::S(D),XQ(h)
- Q(h);N_GUARD::S(D)
- R(b);N_GUARD::S(D),XB(c)
- S(a);S_CUTR(b)::S(D),XB(c)
- S(d);::QAR1(G)
- S(d);XS(D)::QAR1(G)
- S(d);S_CUTR(b)::S(D),XB(c)
- S(d);N_GUARD,S_CUTB(j)::R(A)
- Tries
- Try
- S(F);
- Threat
- R1(H)
- Vars
- S(a);OGATE,XS(F)::P(E),XS(a)
- S(d);XS(D)::QAR1(G)
- Q(h);N_GUARD::S(D)
- S(d);::QAR1(G)
- S(d);S_CUTR(b)::S(D),XB(c)
- Refutation
- S(a);
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- B(j);XS(F)::R1(H)
- S(a);::QAR1(G)
- B(c);::R1(H)
- S(a);::R1(H)
- S(d);S_CUTR(b)::S(D),XB(c)
- S(d);S_CUTQ(h)::S(F)
- Refutation
- Q(h);
- Try
- R(A);CHECK
- Vars
- S(d);XR(A)::QAR1(G)
- Refutation
- B(j);XR(A)
- Try
- R(H);CHECK
- Vars
- K(e);S_FLIGHT::QAR1(G)
- Q(h);N_GUARD,P_SPINQ(h)::QAR1(G),XQ(h)
- Refutation
- B(j);XR(H)
- Try
- Actual
- S(F);
- Threat
- R1(H)
- Vars
- S(d);XS(D)::QAR1(G)
- S(a);N_GUARD::QAB1(G)
- Q(h);N_GUARD::QAR1(G)
- Q(h);N_GUARD::S(D),XQ(h)
- Q(h);N_GUARD::QAR1(G),XQ(h)
- Q(h);N_GUARD::S(D)
- S(d);::QAR1(G)
- S(d);S_CUTR(b)::S(D),XB(c)
- S(d);N_GUARD,S_CUTB(j)::R(A)
- S(d);S_CUTQ(h)::QAR1(G)
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).