MESON Chess Problem Database
Problem Display
PID: 252973 (5B1b/3r2n1/1QB5/2P2R2/2Nk1P2/1K1p1rN1/3P2q1/8 w - - 0 1)
Maleika, Gerhard
StrateGems, 2021
#2
10 + 7
SOLUTION
- SOUND
- Sets
- 1...Re3
- 2.dxe3#
- 1...Rd5
- 2.Rxd5#
- 1...Rd6
- 2.cxd6#
- 1...Ra7
- 2.Rd5#
- 1...Rb7
- 2.Rd5#
- 1...Rc7
- 2.Rd5#
- 1...Re7
- 2.Rd5#
- 1...Rf7
- 2.Rd5#
- 1...Rd8
- 2.Qxd8#
- 1...Sxf5
- 2.Sxf5#
- 1...Re3
- Tries
- 1.Sb2?
- threat
- 2.Qb4#
- 1...Rb7
- 2.Rd5#
- 1...Qxd2!
- threat
- 1.Sa3?
- threat
- 2.Sb5#
- 2.Qb4#
- 1...Rb7
- 2.Sb5#
- 2.Rd5#
- 1...Qxd2!
- threat
- 1.Se3?
- threat
- 2.Qb4#
- 1...Rb7
- 2.Rd5#
- 1...Qxd2!
- threat
- 1.Sa5?
- threat
- 2.Qb4#
- 1...Rb7
- 2.Rd5#
- 1...Qxd2!
- threat
- 1.Sd6?
- threat
- 2.Sb5#
- 2.Rd5#
- 2.Qb4#
- 1...Rxg3
- 2.Sb5#
- 2.Qb4#
- 1...Rxf4
- 2.Sb5#
- 2.Qb4#
- 1...Rxd6
- 2.Qb4#
- 2.cxd6#
- 1...Sxf5
- 2.Sgxf5#
- 2.Sb5#
- 2.Sdxf5#
- 2.Qb4#
- 1...Rf1
- 2.Sb5#
- 2.Qb4#
- 1...Rf2
- 2.Sb5#
- 2.Qb4#
- 1...Re3
- 2.Sb5#
- 2.Qb4#
- 1...Rb7
- 2.Sb5#
- 2.Rd5#
- 1...Qxd2!
- threat
- 1.Bxf3?
- threat
- 2.Qf6#
- 2.c6#
- 1...Sxf5
- 2.Sxf5#
- 2.c6#
- 1...Qe2
- 2.c6#
- 1...Rd5
- 2.Rxd5#
- 1...Rd6
- 2.Qxd6#
- 2.cxd6#
- 2.c6#
- 1...Rb7
- 2.Rd5#
- 1...Re7
- 2.Rd5#
- 2.Qd6#
- 2.c6#
- 1...Rf7
- 2.Rd5#
- 2.Qd6#
- 2.c6#
- 1...Sh5
- 2.c6#
- 1...Se8
- 2.c6#
- 1...Se6!
- threat
- 1.Bxg7+?
- 1...Rxg7
- 2.Rd5#
- 1...Bxg7!
- 1...Rxg7
- 1.Qc7?
- threat
- 2.Qe5#
- 2.Qxd7#
- 1...Rxg3
- 2.Qe5#
- 1...Rxf4
- 2.Qe5#
- 1...Rxc7
- 2.Rd5#
- 1...Sxf5
- 2.Sxf5#
- 1...Se6
- 2.Qxd7#
- 1...Qe2
- 2.Qxd7#
- 1...Rf1
- 2.Qe5#
- 1...Rf2
- 2.Qe5#
- 1...Re3
- 2.dxe3#
- 1...Rd5
- 2.Rxd5#
- 1...Rd6
- 2.Qxd6#
- 1...Re7
- 2.Rd5#
- 2.Qd6#
- 1...Rf7
- 2.Rd5#
- 2.Qe5#
- 2.Qd6#
- 1...Rd8
- 2.Qe5#
- 2.Qxd8#
- 1...Sh5
- 2.Qxd7#
- 1...Se8!
- threat
- 1.Qb4?
- threat
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Qc3#
- 1...Re3
- 2.Sb2#
- 2.Sa3#
- 2.Sxe3#
- 2.Sa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Qc3#
- 2.dxe3#
- 1...Rd6
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sa5#
- 2.Se5#
- 2.Sb6#
- 2.Sxd6#
- 2.Qc3#
- 1...Rb7
- 2.Sb6#
- 2.Rd5#
- 1...Qxd2!
- threat
- 1.Sb2?
- Keys
- 1.Bd6!
- threat
- 2.Be5#
- 2.Rd5#
- 1...Qxg3
- 2.Be5#
- 1...Rxg3
- 2.Be5#
- 1...Rxf4
- 2.Be5#
- 1...Rxd6
- 2.cxd6#
- 1...Sxf5
- 2.Sxf5#
- 1...Se6
- 2.Rd5#
- 1...Qe2
- 2.Rd5#
- 1...Rf1
- 2.Be5#
- 1...Rf2
- 2.Be5#
- 1...Re3
- 2.dxe3#
- 1...Re7
- 2.Rd5#
- 1...Sh5
- 2.Rd5#
- 1...Se8
- 2.Rd5#
- threat
- 1.Bd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 9
- REMOVED MATES = 6
- Sets
- R(c);OGATE::P(A),XR(c)
- R(e);N_GUARD::R1(G),XR(e)
- R(e);OGATE::QAB(H)+P(F),XR(e)
- R(e);N_GUARD::R1(G)
- R(e);N_GUARD,P_PINQ(H)::R1(G)
- R(e);OGATEB::QAR(H),XR(e)
- S(f);XR(G)::S(C),XS(f)
- Tries
- Try
- S(D);
- Threat
- QAR2(H)
- Vars
- R(e);N_GUARD,P_PINQ(H)::R1(G)
- Refutation
- Q(a);XP(A)
- Try
- S(D);
- Threat
- DUALS(2)
- Refutation
- Q(a);XP(A)
- Try
- S(D);
- Threat
- QAR2(H)
- Vars
- R(e);N_GUARD,P_PINQ(H)::R1(G)
- Refutation
- Q(a);XP(A)
- Try
- S(D);
- Threat
- QAR2(H)
- Vars
- R(e);N_GUARD,P_PINQ(H)::R1(G)
- Refutation
- Q(a);XP(A)
- Try
- S(D);
- Threat
- DUALS(3)
- Refutation
- Q(a);XP(A)
- Try
- B(I);XR(c)
- Threat
- DUALS(2)
- Vars
- Q(a);::QAB(H)+P(F)
- R(e);N_GUARD::R1(G),XR(e)
- R(e);N_GUARD,P_PINQ(H)::R1(G)
- S(f);::QAB(H)+P(F)
- Refutation
- S(f);
- Try
- B(J);CHECK,XS(f)
- Vars
- R(e);XB(J)::R1(G)
- Refutation
- B(g);XB(J)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- R(c);XS(C)::QAB1(H)
- R(c);XP(E)::QAB1(H)
- R(e);N_GUARD,XQ(H)::R1(G)
- S(f);XR(G)::S(C),XS(f)
- S(f);::QAR(H),XR(e)
- Q(a);::QAR(H),XR(e)
- R(c);::QAB1(H)
- R(c);OGATE::P(A),XR(c)
- R(e);N_GUARD::R1(G),XR(e)
- R(e);N_GUARD::QAR2(H),XR(e)
- Refutation
- S(f);
- Try
- Q(H);
- Threat
- DUALS(8)
- Refutation
- Q(a);XP(A)
- Try
- Actual
- B(J);
- Threat
- DUALS(2)
- Vars
- Q(a);XS(C)::B(J)
- R(c);XS(C)::B(J)
- R(c);XP(E)::B(J)
- R(e);OGATE,XB(J)::QAB(H)+P(F),XR(e)
- S(f);XR(G)::S(C),XS(f)
- S(f);::R1(G)
- Q(a);::R1(G)
- R(c);::B(J)
- R(c);OGATE::P(A),XR(c)
- R(e);::R1(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).