MESON Chess Problem Database
Problem Display
PID: 141911 (B6B/Rr6/1p1R1N2/nPP1kN2/K3P3/1p2P2p/1b4q1/7Q w - - 0 1)
von Alvensleben, Wichard Udo Reinhard
Deutsche Schachzeitung, 1987
#2
12 + 8
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Sg4#
- 2.Sd7#
- 1...Qxe4+
- 2.Qxe4#
- 1...Qg1
- 2.Sg4#
- 2.Sd7#
- 1...Qc2
- 2.Sg4#
- 2.Sd7#
- 1...Qd2
- 2.Sg4#
- 2.Sd7#
- 1...Qe2
- 2.Sg4#
- 2.Sd7#
- 1...Qf2
- 2.Sg4#
- 2.Sd7#
- 1...Qh2
- 2.Sg4#
- 2.Sd7#
- 2.Qxh2#
- 1...Qg3
- 2.Sg4#
- 2.Sd7#
- 1...Qg4
- 2.Sxg4#
- 2.Sd7#
- 1...Qg5
- 2.Sg4#
- 2.Sd7#
- 1...Qg6
- 2.Sg4#
- 2.Sd7#
- 1...Qg7
- 2.Sg4#
- 1...Qg8
- 2.Sg4#
- 2.Sd7#
- 1...Rxa7
- 2.Sg4#
- 2.Sd7#
- 1...Rc7
- 2.Sg4#
- 2.Sd7#
- 1...Rd7
- 2.Sg4#
- 2.Sxd7#
- 1...Re7
- 2.Sg4#
- 2.Sd7#
- 2.Rxe7#
- 1...Rf7
- 2.Sg4#
- 2.Sd7#
- 1...Rg7
- 2.Sd7#
- 1...Rh7
- 2.Sg4#
- 2.Sd7#
- 1...Rb8
- 2.Sg4#
- 2.Sd7#
- 2.Re7#
- 1...Qf1
- Tries
- 1.Sg3?
- threat
- 2.Sg4#
- 2.Sd7#
- 1...Qxe4+
- 2.Qxe4#
- 1...Rd7
- 2.Sg4#
- 2.Sxd7#
- 1...bxc5!
- threat
- 1.Sd4?
- threat
- 2.Rd5#
- 2.Re6#
- 1...Qxe4
- 2.Sg4#
- 2.Sd7#
- 2.Re6#
- 2.Qxe4#
- 1...Qg4
- 2.Sxg4#
- 2.Sd7#
- 2.Rd5#
- 1...Qg7
- 2.Sf3#
- 2.Sg4#
- 2.Re6#
- 1...Qg8
- 2.Sf3#
- 2.Sg4#
- 2.Sd7#
- 1...Rd7
- 2.Sg4#
- 2.Sxd7#
- 2.Re6#
- 1...Re7
- 2.Sg4#
- 2.Sd7#
- 2.Rd5#
- 2.Rxe7#
- 1...Rg7
- 2.Sd7#
- 2.Re6#
- 1...Bxd4!
- threat
- 1.Qxg2?
- threat
- 2.Sg4#
- 2.Sd7#
- 2.Qxb2#
- 2.Qh2#
- 2.Qg3#
- 1...Rd7
- 2.Sg4#
- 2.Sxd7#
- 2.Qxb2#
- 2.Qh2#
- 2.Qg3#
- 1...Rg7
- 2.Sg4#
- 2.Sd7#
- 2.Qxb2#
- 1...Ba1
- 2.Sg4#
- 2.Sd7#
- 2.Qh2#
- 2.Qg3#
- 1...Bc1
- 2.Sg4#
- 2.Sd7#
- 2.Qh2#
- 2.Qg3#
- 1...Ba3
- 2.Sg4#
- 2.Sd7#
- 2.Qh2#
- 2.Qg3#
- 1...Bc3
- 2.Sg4#
- 2.Sd7#
- 2.Qh2#
- 2.Qg3#
- 1...Bd4
- 2.Sg4#
- 2.Sd7#
- 2.Qh2#
- 2.Qg3#
- 1...Sc4
- 2.Sg4#
- 2.Sd7#
- 2.Qh2#
- 2.Qg3#
- 1...Sc6
- 2.Sg4#
- 2.Sd7#
- 2.Qh2#
- 2.Qg3#
- 1...h2
- 2.Sg4#
- 2.Sd7#
- 2.Qxb2#
- 2.Qxh2#
- 2.Qg3#
- 1...hxg2!
- threat
- 1.Qb1?
- threat
- 2.Sg4#
- 2.Sd7#
- 1...Qxe4+
- 2.Qxe4#
- 1...Qg7
- 2.Sg4#
- 2.Qxb2#
- 1...Qg4
- 2.Sxg4#
- 2.Sd7#
- 2.Qxb2#
- 1...Rd7
- 2.Sg4#
- 2.Sxd7#
- 1...Rg7
- 2.Sd7#
- 1...Qc2!
- threat
- 1.Qh2+?
- 1...Qg3
- 2.Qxg3#
- 2.Qxb2#
- 1...Qxh2!
- 1...Qg3
- 1.Sg3?
- Keys
- 1.Sg7!
- threat
- 2.Re6#
- 1...Qxe4+
- 2.Qxe4#
- 1...Qxg7
- 2.Sg4#
- 1...Rxg7
- 2.Sd7#
- 1...Qg4
- 2.Sxg4#
- 1...Re7
- 2.Rxe7#
- threat
- 1.Sg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(b);CHECK,OGATE,XP(D)::QAR1(A),XQ(b)
- Q(b);::S(I)
- R(h);::S(I)
- Tries
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,OGATE,XP(D)::QAR1(A),XQ(b)
- Refutation
- P(g);XP(F)
- Try
- S(G);
- Threat
- DUALS(2)
- Refutation
- B(a);XS(G)
- Try
- Q(A);XQ(b)
- Threat
- DUALS(5)
- Refutation
- P(d);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,OGATE,XP(D)::QAR1(A),XQ(b)
- R(h);::S(I)
- Refutation
- Q(b);
- Try
- Q(A);CHECK
- Refutation
- Q(b);XQ(A)
- Try
- Actual
- S(G);
- Threat
- R1(H)
- Vars
- Q(b);CHECK,OGATE,XP(D)::QAR1(A),XQ(b)
- Q(b);N_GUARD,XS(G)::S(I)
- R(h);N_GUARD,XS(G)::S(I)
- Q(b);N_GUARD,P_PINP(D)::S(I),XQ(b)
- R(h);OGATE::R(J),XR(h)
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).