MESON Chess Problem Database
Problem Display
PID: 207569 (8/3K4/8/1p1R4/2k1NR1Q/pN6/B1Pq4/8 w - - 0 1)
Kockelkorn, Carl
Kohtz, Johannes
Great Britain, 1873
#2
8 + 4
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Rd4#
- 1...Qe1
- 2.Rd4#
- 1...Qb4
- 2.Sbd2#
- 2.Sa5#
- 2.Rd4#
- 1...Qxf4
- 2.Rd4#
- 1...Qa5
- 2.Rd4#
- 1...Qxc2
- 2.Rd4#
- 1...Qe2
- 2.Rd4#
- 1...Qg2
- 2.Rd4#
- 1...Qh2
- 2.Rd4#
- 1...Qd4
- 2.Rxd4#
- 1...b4
- 2.Sbxd2#
- 2.Sa5#
- 1...Qc1
- Tries
- 1.Sexd2+?
- 1...Kxd5
- 2.Rf5#
- 2.Qg5#
- 2.Qh5#
- 1...Kc3!
- 1...Kxd5
- 1.Sd6+?
- 1...Kxd5
- 2.Rf5#
- 2.Qg5#
- 2.Qh5#
- 1...Kc3!
- 1...Kxd5
- 1.Rxd2?
- threat
- 2.Rd4#
- 1...Kb4
- 2.Rd4#
- 1...b4!
- threat
- 1.Rd3?
- threat
- 2.Sexd2#
- 2.Sd6#
- 1...Kb4
- 2.Sexd2#
- 1...Qxf4
- 2.Rd4#
- 1...Qxc2
- 2.Sf2#
- 2.Sec5#
- 2.Rd4#
- 1...Qc1
- 2.Sed2#
- 2.Sd6#
- 2.Rd4#
- 1...Qe1
- 2.Sed2#
- 2.Sd6#
- 2.Rd4#
- 1...Qc3
- 2.Sed2#
- 2.Sxc3#
- 2.Sd6#
- 1...Qe3
- 2.Sed2#
- 2.Sd6#
- 1...Qb4
- 2.Sbd2#
- 2.Sa5#
- 2.Sed2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sec5#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 2.Rd4#
- 1...Qa5
- 2.Sed2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sec5#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 2.Rd4#
- 1...Qd1
- 2.Sed2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sec5#
- 2.Sg5#
- 2.Sd6#
- 2.Sf6#
- 1...Qe2
- 2.Sed2#
- 2.Sd6#
- 2.Rd4#
- 1...Qf2
- 2.Sed2#
- 2.Sxf2#
- 2.Sd6#
- 1...Qg2
- 2.Sed2#
- 2.Sd6#
- 2.Rd4#
- 1...Qh2
- 2.Sed2#
- 2.Sg3#
- 2.Sd6#
- 2.Rd4#
- 1...b4
- 2.Sd6#
- 1...Qxd3+!
- threat
- 1.Qe7?
- threat
- 2.Sa1#
- 2.Sc1#
- 2.Sbxd2#
- 2.Sd4#
- 2.Sa5#
- 2.Qc5#
- 1...Kxd5
- 2.Sf6#
- 2.Qc5#
- 2.Qe6#
- 1...Qxf4
- 2.Sa1#
- 2.Sc1#
- 2.Sbd2#
- 2.Sd4#
- 2.Sa5#
- 2.Rd4#
- 2.Qc5#
- 1...Qxc2
- 2.Sbd2#
- 2.Sa5#
- 2.Rd4#
- 2.Qc5#
- 1...Qe3
- 2.Sbd2#
- 2.Sa5#
- 1...Qc1
- 2.Sa1#
- 2.Sxc1#
- 2.Sbd2#
- 2.Sd4#
- 2.Sa5#
- 2.Rd4#
- 2.Qc5#
- 1...Qe1
- 2.Sa1#
- 2.Sc1#
- 2.Sbd2#
- 2.Sd4#
- 2.Sa5#
- 2.Rd4#
- 2.Qc5#
- 1...Qc3
- 2.Sbd2#
- 2.Sa5#
- 2.Qc5#
- 1...Qb4
- 2.Sbd2#
- 2.Sa5#
- 2.Rd4#
- 1...Qa5
- 2.Sa1#
- 2.Sc1#
- 2.Sbd2#
- 2.Sd4#
- 2.Sxa5#
- 2.Rd4#
- 2.Qc5#
- 1...Qd1
- 2.Sa1#
- 2.Sc1#
- 2.Sbd2#
- 2.Sd4#
- 2.Sa5#
- 2.Qc5#
- 1...Qe2
- 2.Sa1#
- 2.Sc1#
- 2.Sbd2#
- 2.Sd4#
- 2.Sa5#
- 2.Rd4#
- 2.Qc5#
- 1...Qf2
- 2.Sa1#
- 2.Sc1#
- 2.Sbd2#
- 2.Sd4#
- 2.Sa5#
- 1...Qg2
- 2.Sa1#
- 2.Sc1#
- 2.Sbd2#
- 2.Sd4#
- 2.Sa5#
- 2.Rd4#
- 2.Qc5#
- 1...Qh2
- 2.Sa1#
- 2.Sc1#
- 2.Sbd2#
- 2.Sd4#
- 2.Sa5#
- 2.Rd4#
- 2.Qc5#
- 1...Qd3
- 2.Sbd2#
- 2.Sa5#
- 2.Qc5#
- 1...Qd4
- 2.Sa1#
- 2.Sc1#
- 2.Sbd2#
- 2.Sxd4#
- 2.Sa5#
- 2.Rxd4#
- 1...b4
- 2.Sbxd2#
- 2.Sa5#
- 2.Qc5#
- 1...Qxd5+!
- threat
- 1.Sexd2+?
- Keys
- 1.Qe1!
- 1...Qxd5+
- 2.Sd6#
- 1...Kb4
- 2.Rd4#
- 1...Kxd5
- 2.Sf6#
- 1...Qxe1
- 2.Rd4#
- 1...Qxf4
- 2.Sa1#
- 2.Sc1#
- 2.Sd4#
- 2.Sa5#
- 2.Sbc5#
- 2.Rd4#
- 2.Rc5#
- 1...Qxc2
- 2.Sa5#
- 2.Rd4#
- 1...Qc1
- 2.Sa1#
- 2.Sxc1#
- 2.Sd4#
- 2.Sa5#
- 2.Sbc5#
- 2.Rd4#
- 2.Rc5#
- 1...Qc3
- 2.Sxc3#
- 1...Qe3
- 2.Sa5#
- 1...Qb4
- 2.Sbd2#
- 2.Sa5#
- 2.Sc3#
- 2.Sf6#
- 2.Rd4#
- 1...Qa5
- 2.Sa1#
- 2.Sc1#
- 2.Sd4#
- 2.Sxa5#
- 2.Sbc5#
- 2.Sc3#
- 2.Sf6#
- 2.Rd4#
- 2.Rc5#
- 1...Qd1
- 2.Sa1#
- 2.Sc1#
- 2.Sd4#
- 2.Sa5#
- 2.Sbc5#
- 1...Qe2
- 2.Sa1#
- 2.Sc1#
- 2.Sd4#
- 2.Sa5#
- 2.Sbc5#
- 2.Rd4#
- 2.Rc5#
- 1...Qf2
- 2.Sa1#
- 2.Sc1#
- 2.Sd4#
- 2.Sa5#
- 2.Sbc5#
- 1...Qg2
- 2.Sa1#
- 2.Sc1#
- 2.Sd4#
- 2.Sa5#
- 2.Sbc5#
- 2.Rd4#
- 2.Rc5#
- 1...Qh2
- 2.Sa1#
- 2.Sc1#
- 2.Sd4#
- 2.Sa5#
- 2.Sbc5#
- 2.Rd4#
- 2.Rc5#
- 1...Qd3
- 2.Sa5#
- 1...Qd4
- 2.Sa1#
- 2.Sc1#
- 2.Sxd4#
- 2.Sa5#
- 2.Sbc5#
- 2.Rxd4#
- 1...b4
- 2.Sbxd2#
- 2.Sa5#
- 1...Qxd5+
- 1.Qe1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 8
- Sets
- Q(a);N_GUARD,N_PINR(G)::R1(G)
- Q(a);N_GUARD,N_PINR(G),XR(E)::R1(G)
- Q(a);N_GUARD,N_PINR(G),XP(B)::R1(G)
- Q(a);N_GUARD::R1(G),XQ(a)
- Tries
- Try
- S(D);CHECK,N_SPINR(G),XQ(a)
- Refutation
- K(c);P-FLIGHT
- Try
- S(D);CHECK,N_SPINR(G)
- Refutation
- K(c);P-FLIGHT
- Try
- R(G);N_SPINR(G),XQ(a)
- Threat
- R1(G)
- Vars
- K(c);P-FLIGHT::R(G)
- Refutation
- P(d);
- Try
- R(G);
- Threat
- DUALS(2)
- Vars
- K(c);P-FLIGHT::R(E)+S(D),XQ(a)
- Q(a);N_GUARD,N_PINR(G),XR(E)::R1(G)
- P(d);SBLOCK::R(E)+S(D),DCHECK
- Refutation
- Q(a);CHECK,XR(G)
- Try
- Q(F);
- Threat
- DUALS(6)
- Refutation
- Q(a);CHECK,XR(G)
- Try
- Actual
- Q(F);
- Vars
- Q(a);CHECK,SBLOCK,XR(G)::R(E)+S(D),DCHECK
- K(c);P-FLIGHT,P_SPINQ(a)::R(G)
- K(c);S_FLIGHT,XR(G)::S(D)
- Q(a);N_GUARD,N_PINR(G),XQ(F)::R1(G)
- Q(a);N_GUARD,N_PINR(G)::R(E)+S(D),XQ(a)
- Q(a);N_PINR(G)::B(A)+S(C),DCHECK
- Q(a);::B(A)+S(C),DCHECK
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).