MESON Chess Problem Database
Problem Display
PID: 252611 (2R1r1B1/3Q1n2/8/Pqb2NRb/1rkN2p1/1p2p3/1K2P3/5n2 w - - 0 1)
Loustau, Jean-Marc
StrateGems, 2021
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Re6
- 2.Qxe6#
- 1...Rxc8
- 2.Qe6#
- 1...Rf8
- 2.Qe6#
- 1...Rxg8
- 2.Qe6#
- 1...Re6
- Tries
- 1.Sxb3?
- threat
- 2.Sd6#
- 2.Qd3#
- 2.Qd4#
- 1...Qxd7
- 2.Rxc5#
- 1...Qxa5
- 2.Sd6#
- 2.Qd3#
- 1...Rxc8
- 2.Qe6#
- 2.Qd3#
- 1...Rxg8
- 2.Qe6#
- 2.Qd3#
- 2.Qd4#
- 1...Qc6
- 2.Qd3#
- 1...Ra4
- 2.Qd4#
- 1...Qa4
- 2.Sd6#
- 2.Rxc5#
- 2.Qd3#
- 1...Qa6
- 2.Rxc5#
- 2.Qd3#
- 1...Qb6
- 2.Qd3#
- 1...Qb7
- 2.Sd6#
- 2.Rxc5#
- 2.Qd3#
- 1...Qb8
- 2.Rxc5#
- 2.Qd3#
- 1...Re4
- 2.Sd6#
- 2.Qd3#
- 1...Re5
- 2.Qd3#
- 2.Qd4#
- 1...Re6
- 2.Qxe6#
- 2.Qd3#
- 2.Qd4#
- 1...Rd8
- 2.Sd6#
- 1...Rxb3+!
- threat
- 1.Sf3?
- threat
- 2.Sd6#
- 2.Qd3#
- 2.Qd4#
- 1...Qxa5
- 2.Sd6#
- 2.Qd3#
- 1...Rxc8
- 2.Se5#
- 2.Qe6#
- 2.Qd3#
- 1...Rxg8
- 2.Qe6#
- 2.Qd3#
- 2.Qd4#
- 1...gxf3
- 2.Qd3#
- 2.Qd4#
- 1...Qc6
- 2.Qd3#
- 1...Ra4
- 2.Qd4#
- 1...Qa4
- 2.Sd6#
- 2.Qd3#
- 1...Qa6
- 2.Qd3#
- 1...Qb6
- 2.Qd3#
- 1...Qb7
- 2.Sd6#
- 2.Qd3#
- 1...Qb8
- 2.Qd3#
- 1...Re4
- 2.Sd6#
- 2.Qd3#
- 1...Re5
- 2.Sxe5#
- 2.Qd3#
- 2.Qd4#
- 1...Re6
- 2.Qxe6#
- 2.Qd3#
- 2.Qd4#
- 1...Rd8
- 2.Se5#
- 2.Sd6#
- 1...Qxd7!
- threat
- 1.Sxb5?
- threat
- 2.Sa3#
- 2.Sfd6#
- 2.Qd3#
- 1...Rxb5
- 2.Qd4#
- 1...Rxc8
- 2.Sa3#
- 2.Qd3#
- 1...Rxg8
- 2.Sa3#
- 2.Qd3#
- 1...Re5
- 2.Sa3#
- 2.Qd3#
- 1...Re6
- 2.Sa3#
- 2.Qd3#
- 1...Rd8
- 2.Sa3#
- 2.Sfd6#
- 1...Ra4!
- threat
- 1.Se6?
- threat
- 2.Qd3#
- 2.Qd4#
- 1...Qxd7
- 2.Rxc5#
- 1...Qxa5
- 2.Qd3#
- 1...Rxc8
- 2.Qd3#
- 1...Qc6
- 2.Qd3#
- 1...Ra4
- 2.Qd4#
- 1...Sd6
- 2.Sxd6#
- 1...Qa4
- 2.Rxc5#
- 2.Qd3#
- 1...Qa6
- 2.Rxc5#
- 2.Qd3#
- 1...Qb6
- 2.Qd3#
- 1...Qb7
- 2.Rxc5#
- 2.Qd3#
- 1...Qb8
- 2.Rxc5#
- 2.Qd3#
- 1...Se5
- 2.Qd4#
- 1...Rd8!
- threat
- 1.Sxe3+?
- 1...Rxe3
- 2.Qd5#
- 1...Sxe3!
- 1...Rxe3
- 1.Bxf7+?
- 1...Re6
- 2.Bxe6#
- 2.Qxe6#
- 1...Bxf7!
- 1...Re6
- 1.Qxf7+?
- 1...Re6
- 2.Qxe6#
- 1...Bxf7!
- 1...Re6
- 1.Sxb3?
- Keys
- 1.Sc6!
- threat
- 2.Qd3#
- 1...Bd4+
- 2.Qxd4#
- 1...Bb6
- 2.Sd6#
- 2.Se5#
- 1...Bd6
- 2.Sxd6#
- 1...Ba7
- 2.Sd6#
- 2.Se5#
- 1...Be7
- 2.Se5#
- 2.Qd4#
- 1...Bf8
- 2.Se5#
- 2.Qd4#
- 1...Rd8
- 2.Se5#
- threat
- 1.Sc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- R(k);N_GUARD,N_SPINS(j)::QAB(G),XR(k)
- R(k);N_GUARD,N_SPINB(h),XR(H)::QAB(G)
- R(k);N_GUARD::QAB(G)
- R(k);N_GUARD,N_SPINS(j),XB(I)::QAB(G)
- Tries
- Try
- S(C);P_SPINS(C),XP(b)
- Threat
- DUALS(3)
- Vars
- Q(g);N_GUARD,XQ(G)::R1(H),XB(h)
- Q(g);N_SPINB(h)::QAB1(G)
- R(d);::QAR1(G)
- Q(g);::QAB1(G)
- R(k);::S(E)
- Refutation
- R(d);CHECK,XS(C)
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- Q(g);N_SPINB(h)::QAB1(G)
- R(d);::QAR1(G)
- Q(g);::QAB1(G)
- Refutation
- Q(g);XQ(G)
- Try
- S(C);XQ(g)
- Threat
- DUALS(3)
- Vars
- R(d);SBLOCK,XS(C)::QAR1(G)
- Refutation
- R(d);
- Try
- S(C);N_PINS(j)
- Threat
- DUALS(2)
- Vars
- Q(g);N_GUARD,XQ(G)::R1(H),XB(h)
- Q(g);XP(D)::QAB1(G)
- R(k);N_SPINB(h),XR(H)::QAB1(G)
- Q(g);N_SPINB(h)::QAB1(G)
- R(d);::QAR1(G)
- S(j);N_GUARD::S(E),XS(j)
- Q(g);::QAB1(G)
- S(j);::QAR1(G)
- Refutation
- R(k);
- Try
- S(E);CHECK,XP(c)
- Vars
- R(k);XS(E)::QAB1(G)
- Refutation
- S(a);XS(E)
- Try
- B(I);CHECK,XS(j)
- Refutation
- B(i);XB(I)
- Try
- Q(G);CHECK,XS(j)
- Vars
- R(k);N_GUARD,P_SPINR(k)::QAB(G),XR(k)
- Refutation
- B(i);XQ(G)
- Try
- Actual
- S(C);N_PINB(h)
- Threat
- QAB1(G)
- Vars
- B(h);CHECK,N_GUARD::QAR1(G),XB(h)
- B(h);N_GUARD::S(E),XB(h)
- R(k);N_GUARD::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).