MESON Chess Problem Database
Problem Display
PID: 135342 (5Rr1/2KpB2n/1P5n/Q4q2/R1Nk4/3N1P2/1P2B3/8 w - - 0 1)
Laib, Kurt Friedrich
Schackvarlden, 1934
#2
11 + 6
SOLUTION
- SOUND
- Sets
- 1...Qxd3
- 2.Qc5#
- 2.Qe5#
- 1...Qh3
- 2.Rf4#
- 2.Qc5#
- 2.Qe5#
- 1...Qe4
- 2.Qc5#
- 1...Qg4
- 2.Qc5#
- 2.Qe5#
- 1...Qe6
- 2.Qc5#
- 1...Qg6
- 2.Qc5#
- 2.Qe5#
- 1...Qxf3
- 2.Qe5#
- 1...Qf4+
- 2.Rxf4#
- 1...Qc5+
- 2.Qxc5#
- 1...Qd5
- 2.Qc3#
- 1...Qe5+
- 2.Qxe5#
- 1...Qh5
- 2.Rf4#
- 1...Qf6
- 2.Qc5#
- 1...Qf7
- 2.Qc5#
- 2.Qe5#
- 1...Qxf8
- 2.Qc5#
- 2.Qe5#
- 1...d5
- 2.Bc5#
- 2.Qc3#
- 2.Qc5#
- 1...Qxd3
- Tries
- 1.Sc1?
- threat
- 2.Sb3#
- 1...Qf4+
- 2.Rxf4#
- 1...Qc5+
- 2.Qxc5#
- 1...Qe5+
- 2.Qxe5#
- 1...Qxf3
- 2.Qe5#
- 1...Qb5
- 2.Qd2#
- 1...Qc2
- 2.Qc5#
- 2.Qe5#
- 1...Qd3
- 2.Qc5#
- 2.Qe5#
- 1...Qxa5!
- threat
- 1.Sde5?
- threat
- 2.Qc5#
- 1...Qxe5+
- 2.Qxe5#
- 1...d6
- 2.Sc6#
- 1...Qxf3!
- threat
- 1.Bc5+?
- 1...Qxc5+
- 2.Qxc5#
- 1...Kd5!
- 1...Qxc5+
- 1.Bf6+?
- 1...Qe5+
- 2.Bxe5#
- 2.Qxe5#
- 1...Qxf6
- 2.Qc5#
- 1...Sxf6!
- 1...Qe5+
- 1.Rxf5?
- threat
- 2.Bc5#
- 2.Rf4#
- 2.Rd5#
- 2.Qc3#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Sxf5
- 2.Qc5#
- 2.Qe5#
- 1...Rg4
- 2.Bc5#
- 2.Rd5#
- 2.Qc3#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Rg5
- 2.Bc5#
- 2.Rf4#
- 2.Qc3#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Rf8
- 2.Bc5#
- 2.Rd5#
- 2.Qc3#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Sg4
- 2.Bc5#
- 2.Rf4#
- 2.Rd5#
- 2.Qc3#
- 2.Qc5#
- 2.Qd5#
- 1...Sf7
- 2.Bc5#
- 2.Rf4#
- 2.Rd5#
- 2.Qc3#
- 2.Qc5#
- 2.Qd5#
- 1...Sg5
- 2.Bc5#
- 2.Bf6#
- 2.Rd5#
- 2.Qc3#
- 2.Qc5#
- 2.Qd5#
- 2.Qe5#
- 1...Sf6
- 2.Bc5#
- 2.Bxf6#
- 2.Qc3#
- 2.Qc5#
- 2.Qe5#
- 1...d5
- 2.Bc5#
- 2.Rf4#
- 2.Rxd5#
- 2.Qc3#
- 2.Qc5#
- 2.Qxd5#
- 1...d6
- 2.Rf4#
- 2.Rd5#
- 2.Qc3#
- 2.Qd5#
- 1...Rc8+!
- threat
- 1.Qxf5?
- threat
- 2.Bc5#
- 2.Qe4#
- 2.Qxd7#
- 2.Qc5#
- 2.Qe5#
- 1...Sxf8
- 2.Bc5#
- 2.Bf6#
- 2.Qe4#
- 2.Qc5#
- 2.Qe5#
- 1...Rg4
- 2.Bc5#
- 2.Qxd7#
- 2.Qc5#
- 2.Qe5#
- 1...Rg5
- 2.Bc5#
- 2.Qe4#
- 1...Rg6
- 2.Bc5#
- 2.Qe4#
- 2.Qc5#
- 2.Qe5#
- 1...Sg4
- 2.Bc5#
- 2.Qe4#
- 2.Qxd7#
- 2.Qc5#
- 1...Sf7
- 2.Bc5#
- 2.Qe4#
- 2.Qc5#
- 1...Sg5
- 2.Bc5#
- 2.Bf6#
- 2.Qxd7#
- 2.Qc5#
- 2.Qe5#
- 1...Sf6
- 2.Bc5#
- 2.Bxf6#
- 2.Qc5#
- 2.Qe5#
- 1...d5
- 2.Bc5#
- 2.Qf4#
- 2.Qe5#
- 1...d6
- 2.Qe4#
- 1...Sxf5!
- threat
- 1.Sc1?
- Keys
- 1.Qd2!
- threat
- 2.Se3#
- 1...Qf4+
- 2.Sxf4#
- 1...Qc5+
- 2.Sxc5#
- 1...Qe5+
- 2.Sdxe5#
- 1...Kd5
- 2.Sf4#
- 1...Qxd3
- 2.Qxd3#
- 1...Qe6
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 2.Sde5#
- 1...Qa5
- 2.Sb4#
- 1...Qb5
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 2.Sde5#
- 1...Qd5
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 2.Sde5#
- 2.Qc3#
- 2.Qe3#
- 1...Qf7
- 2.Sc1#
- 2.Se1#
- 2.Sf2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 2.Sde5#
- threat
- 1.Qd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- Q(b);N_GUARD::QAB1(G)
- Q(b);N_GUARD,XP(D)::QAB1(G)
- Q(b);CHECK,OGATE::R(K),XQ(b)
- Q(b);CHECK,N_GUARD::QAB1(G),XQ(b)
- Q(b);SBLOCK::QAB1(G)
- Q(b);OGATE::R(K)
- Tries
- Try
- S(C);
- Threat
- S(C)
- Vars
- Q(b);CHECK,OGATE::R(K),XQ(b)
- Q(b);CHECK,N_GUARD::QAB1(G),XQ(b)
- Q(b);N_GUARD,XP(D)::QAB1(G)
- Q(b);N_GUARD::QAR2(G)
- Refutation
- Q(b);P_PINP(H),XQ(G)
- Try
- S(C);
- Threat
- QAB1(G)
- Vars
- Q(b);CHECK,OGATE,XS(C)::QAB1(G),XQ(b)
- P(d);N_GUARD::S(C)
- Refutation
- Q(b);XP(D)
- Try
- B(J);CHECK
- Vars
- Q(b);CHECK,OGATE,XB(J)::QAB1(G),XQ(b)
- Refutation
- K(a);P-FLIGHT
- Try
- B(J);CHECK
- Vars
- Q(b);XB(J)::QAB1(G)
- Refutation
- S(e);XB(J)
- Try
- R(K);XQ(b)
- Threat
- DUALS(7)
- Refutation
- R(f);CHECK
- Try
- Q(G);XQ(b)
- Threat
- DUALS(5)
- Vars
- P(d);::QAR1(G)
- Refutation
- S(c);XQ(G)
- Try
- Actual
- Q(G);
- Threat
- R(E)+S(F)
- Vars
- Q(b);CHECK,N_GUARD::QAR(G)+S(C),XQ(b)
- K(a);P-FLIGHT::QAR(G)+S(C),DCHECK
- Q(b);OGATE,P_SPINQ(b),XS(C)::QAR1(G),XQ(b)
- Q(b);N_GUARD,P_PINP(H)::QAR(G)+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).