MESON Chess Problem Database
Problem Display
PID: 189716 (8/q1b1N1n1/p6R/4k1p1/1ppR4/6p1/1Q6/B2bN1Kn w - - 0 1)
Gadschiev, Fikrat N
O'Keefe, John James
1st Prize, Australasian (The), 1912
#2
7 + 11
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qxd4+
- 2.Qxd4#
- 1...Qb8
- 2.Rxc4#
- 1...Qb7
- 2.Rxc4#
- 1...Qa8
- 2.Rxc4#
- 1...Bc2
- 2.Sf3#
- 1...Be2
- 2.Qxe2#
- 1...Bb3
- 2.Sf3#
- 2.Qe2#
- 1...Bf3
- 2.Sxf3#
- 1...Ba4
- 2.Sf3#
- 2.Qe2#
- 1...Sf5
- 2.Sc6#
- 1...Qxd4+
- Tries
- 1.Qc1?
- threat
- 2.Qe3#
- 1...Qb7
- 2.Rxc4#
- 1...Qa8
- 2.Rxc4#
- 1...Bc2
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Sf5
- 2.Sc6#
- 1...Sf2!
- threat
- 1.Qb1?
- threat
- 2.Sc6#
- 2.Qe4#
- 1...Qc5
- 2.Qe4#
- 1...Qb6
- 2.Qe4#
- 1...Qb7
- 2.Rxc4#
- 2.Re4#
- 1...Qa8
- 2.Rxc4#
- 2.Re4#
- 1...Bc2
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Ba4
- 2.Sf3#
- 2.Qe4#
- 1...Sf2
- 2.Sc6#
- 2.Re4#
- 1...Qxd4+!
- threat
- 1.Qc2?
- threat
- 2.Sc6#
- 2.Qe4#
- 1...Bxc2
- 2.Sf3#
- 1...Qc5
- 2.Qe4#
- 1...Qb6
- 2.Qe4#
- 1...Qb7
- 2.Rxc4#
- 2.Re4#
- 1...Qa8
- 2.Rxc4#
- 2.Re4#
- 1...Bf3
- 2.Sxf3#
- 1...Sf2
- 2.Sc6#
- 2.Re4#
- 1...Qxd4+!
- threat
- 1.Qd2?
- threat
- 2.Qe3#
- 1...Qb7
- 2.Rxc4#
- 1...Qa8
- 2.Rxc4#
- 1...Bc2
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Sf5
- 2.Sc6#
- 1...Sf2!
- threat
- 1.Qg2?
- threat
- 2.Qe4#
- 2.Qd5#
- 1...Qc5
- 2.Qe4#
- 1...Qb7
- 2.Rxc4#
- 2.Re4#
- 1...Qa8
- 2.Rxc4#
- 2.Re4#
- 1...Bc2
- 2.Sf3#
- 2.Qd5#
- 1...Bf3
- 2.Sxf3#
- 1...Sf2
- 2.Re4#
- 2.Qd5#
- 2.Qxg3#
- 1...Qxd4+!
- threat
- 1.Qc1?
- Keys
- 1.Qb3!
- threat
- 2.Qe3#
- 1...Bxb3
- 2.Sf3#
- 1...cxb3
- 2.Sd3#
- 1...c3
- 2.Qd5#
- 1...Qb7
- 2.Rxc4#
- 1...Qa8
- 2.Rxc4#
- 1...Bc2
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Sf2
- 2.Qxg3#
- 1...Sf5
- 2.Sc6#
- threat
- 1.Qb3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 3
- Sets
- Q(i);CHECK,OGATE,P_SPINQ(i),XR(E)::QAB1(D),XQ(i)
- Q(i);N_PINR(E)::QAB(D)+R(E),XP(e)
- B(a);N_GUARD::S(B)
- B(a);N_GUARD::QAR(D),XB(a)
- B(a);N_GUARD::S(B),XB(a)
- S(k);SBLOCK::S(G)
- Tries
- Try
- Q(D);
- Threat
- QAR2(D)
- Vars
- Q(i);N_PINR(E)::B(A)+R(E),XP(e)
- B(a);N_GUARD::S(B)
- B(a);N_GUARD::S(B),XB(a)
- S(k);SBLOCK::S(G)
- Refutation
- S(b);N_PINR(E)
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- Q(i);::QAR1(D)
- B(a);N_GUARD::S(B)
- B(a);N_GUARD::S(B),XB(a)
- Refutation
- Q(i);CHECK,P_SPINQ(i),XR(E)
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- B(a);N_GUARD,XQ(D)::S(B)
- Q(i);::QAR1(D)
- B(a);N_GUARD::S(B),XB(a)
- Refutation
- Q(i);CHECK,P_SPINQ(i),XR(E)
- Try
- Q(D);
- Threat
- QAR2(D)
- Vars
- Q(i);N_PINR(E)::B(A)+R(E),XP(e)
- B(a);N_GUARD::S(B)
- B(a);N_GUARD::S(B),XB(a)
- S(k);SBLOCK::S(G)
- Refutation
- S(b);N_PINR(E)
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- Q(i);::QAR1(D)
- B(a);N_GUARD::S(B),XB(a)
- Refutation
- Q(i);CHECK,P_SPINQ(i),XR(E)
- Try
- Actual
- Q(D);
- Threat
- QAR2(D)
- Vars
- B(a);N_GUARD,XQ(D)::S(B)
- P(e);N_GUARD,XQ(D)::S(B)
- P(e);OGATE::QAR1(D)
- Q(i);N_PINR(E)::B(A)+R(E),XP(e)
- B(a);N_GUARD::S(B)
- B(a);N_GUARD::S(B),XB(a)
- S(b);N_GUARD,N_PINR(E)::QAB(D),XP(c)
- S(k);SBLOCK::S(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).