MESON Chess Problem Database
Problem Display
PID: 251603 (2N4B/1q3p1B/b2P1P1r/R2Pkn1R/4N1Qn/1pPp1p2/8/7K w - - 0 1)
Doukhan, Gerard
Loustau, Jean-Marc
Problemas, 2021
#2
12 + 10
SOLUTION
- SOUND
- Sets
- 1...Rxf6
- 2.Bxf6#
- 1...Sg2
- 2.Qxf5#
- 1...Sg6
- 2.Qxf5#
- 1...Rxf6
- Tries
- 1.Sd2?
- threat
- 2.Qg3#
- 2.Qd4#
- 2.Qe4#
- 1...Qxd5
- 2.Qe4#
- 1...Qxc8
- 2.Qg3#
- 1...Rxh5
- 2.Qe4#
- 1...Qb5
- 2.Qd4#
- 2.Qe4#
- 1...Bb5
- 2.Qd4#
- 2.Qe4#
- 1...Qb6
- 2.Qg3#
- 2.Qe4#
- 1...Qa7
- 2.Qg3#
- 2.Qe4#
- 1...Rg6
- 2.Qd4#
- 2.Qe4#
- 1...Sg2
- 2.Sxf3#
- 2.Qxf5#
- 2.Qd4#
- 2.Qe4#
- 1...Sg6
- 2.Sxf3#
- 2.Qxf5#
- 2.Qd4#
- 2.Qe4#
- 1...Qb4!
- threat
- 1.Sf2?
- threat
- 2.Qg3#
- 2.Qd4#
- 2.Qe4#
- 1...Qxd5
- 2.Qe4#
- 1...Qxc8
- 2.Qg3#
- 1...Rxh5
- 2.Qe4#
- 1...Qb5
- 2.Qd4#
- 2.Qe4#
- 1...Bb5
- 2.Qd4#
- 2.Qe4#
- 1...Qb6
- 2.Qg3#
- 2.Qe4#
- 1...Qa7
- 2.Qg3#
- 2.Qe4#
- 1...Rg6
- 2.Qd4#
- 2.Qe4#
- 1...Sg2
- 2.Qxf5#
- 2.Qd4#
- 2.Qe4#
- 1...Sg6
- 2.Qxf5#
- 2.Qd4#
- 2.Qe4#
- 1...Qb4!
- threat
- 1.Sc5?
- threat
- 2.Qd4#
- 2.Qe4#
- 1...Kxd5
- 2.Qe4#
- 1...Qxd5
- 2.Qg3#
- 1...Rxh5
- 2.Qe4#
- 1...Qb4
- 2.Sd7#
- 1...Qxc8!
- threat
- 1.Rxh4?
- threat
- 2.Qxf5#
- 2.Qf4#
- 1...Sg3+
- 2.Qxg3#
- 1...Qxd5
- 2.Qxf5#
- 1...Qxc8
- 2.Qf4#
- 1...Rxh7
- 2.Qf4#
- 1...Sxh4
- 2.Qg3#
- 1...Sxd6
- 2.Qg3#
- 2.Qf4#
- 1...Qb5
- 2.Qxf5#
- 1...Bb5
- 2.Qxf5#
- 1...Qd7
- 2.Qf4#
- 1...Rh5
- 2.Qf4#
- 1...Rg6
- 2.Qf4#
- 1...Se3
- 2.Qg3#
- 2.Qf4#
- 1...Sd4
- 2.Qg3#
- 2.Qf4#
- 1...Se7
- 2.Qg3#
- 2.Qf4#
- 1...Sg7
- 2.Qg3#
- 2.Qf4#
- 1...Rxh4+!
- threat
- 1.Sd2?
- Keys
- 1.Sg5!
- threat
- 2.Qe4#
- 1...Sg3+
- 2.Qxg3#
- 1...Qxc8
- 2.Sxf7#
- 1...Sxd6
- 2.Sxf3#
- 2.Sxf7#
- 2.Qg3#
- 2.Qd4#
- 1...Sg7
- 2.Qd4#
- 1...Qb4
- 2.Sxf7#
- threat
- 1.Sg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 3
- Sets
- R(h);OGATE,P_SPINR(h),XP(I)::B(L),XR(h)
- S(d);N_GUARD,P_PINR(G)::QAR1(D),XS(f)
- Tries
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- Q(i);P_SPINQ(i),XP(F)::QAR1(D)
- Q(i);XS(K)::QAB(D)
- R(h);N_SPINS(f),XR(G)::QAR1(D)
- Refutation
- Q(i);
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- Q(i);P_SPINQ(i),XP(F)::QAR1(D)
- Q(i);XS(K)::QAB(D)
- R(h);N_SPINS(f),XR(G)::QAR1(D)
- Refutation
- Q(i);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- K(e);P-FLIGHT,XP(F)::QAB1(D)
- Q(i);SBLOCK,XP(F)::QAB(D)
- R(h);N_SPINS(f),XR(G)::QAR1(D)
- Q(i);N_GUARD::S(C)
- Refutation
- Q(i);XS(K)
- Try
- R(G);N_PINS(f),P_SPINR(G),XS(d)
- Threat
- DUALS(2)
- Vars
- S(f);CHECK,N_GUARD::QAB(D),XS(f)
- Q(i);P_SPINQ(i),XP(F)::QAR1(D),XS(f)
- Q(i);XS(K)::QAB1(D)
- R(h);XB(J)::QAB1(D)
- S(f);N_GUARD,XR(G)::QAB(D)
- Q(i);::QAR1(D),XS(f)
- B(g);::QAR1(D),XS(f)
- Q(i);::QAB1(D)
- R(h);::QAB1(D)
- R(h);N_PINR(G)::QAB1(D)
- Refutation
- R(h);CHECK,XR(G)
- Try
- Actual
- S(C);N_PINS(f)
- Threat
- QAR1(D)
- Vars
- S(f);CHECK,N_GUARD::QAB(D),XS(f)
- Q(i);N_GUARD,XS(K)::S(C),XP(j)
- S(f);N_GUARD::QAB1(D)
- Q(i);N_GUARD::S(C),XP(j)
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).