MESON Chess Problem Database
Problem Display
PID: 43872 (8/2PK4/3N4/1N1k2b1/pP6/5r1n/6Q1/3nR1Bb w - - 0 1)
Gotfryd, J
De Problemist, 1930
#2
8 + 7
| 81 | Chess | 1946 |
| 5454 | Near Snap | 2007 |
| 136 | Problem Observer | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Bf4
- 2.Qg8#
- 1...Bf6
- 2.Qg8#
- 1...Sb2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sf4
- 2.Qxg5#
- 1...Bf4
- Tries
- 1.Bd4?
- threat
- 2.Re5#
- 1...Be3
- 2.Qa2#
- 1...Bf4
- 2.Qg8#
- 1...Bf6
- 2.Qg8#
- 1...Se3!
- threat
- 1.Qd2+?
- 1...Rd3
- 2.Qxd3#
- 1...Bxd2!
- 1...Rd3
- 1.Qg4?
- threat
- 2.Qe6#
- 2.Qc4#
- 2.Qd4#
- 2.Qe4#
- 1...Re3
- 2.Qd4#
- 1...Be3
- 2.Qe6#
- 2.Qe4#
- 1...Se3
- 2.Qe6#
- 2.Qd4#
- 2.Qe4#
- 1...Rf1
- 2.Qe6#
- 2.Qc4#
- 2.Qd4#
- 1...Rf2
- 2.Qe6#
- 2.Qc4#
- 2.Qd4#
- 1...Ra3
- 2.Qf5#
- 2.Qe6#
- 2.Qc4#
- 2.Qd4#
- 1...Rb3
- 2.Qf5#
- 2.Qe6#
- 2.Qc4#
- 2.Qd4#
- 1...Rc3
- 2.Qf5#
- 2.Qe6#
- 2.Qd4#
- 1...Rd3
- 2.Qf5#
- 2.Qe6#
- 2.Qc4#
- 1...Rg3
- 2.Qf5#
- 2.Qe6#
- 2.Qc4#
- 2.Qd4#
- 1...Rf4
- 2.Qe6#
- 1...Rf5
- 2.Qxf5#
- 2.Qc4#
- 2.Qd4#
- 1...Rf6
- 2.Qc4#
- 2.Qd4#
- 1...Rf8
- 2.Qe6#
- 2.Qc4#
- 2.Qd4#
- 1...Bf4
- 2.Qe6#
- 2.Qg8#
- 1...Bf6
- 2.Qe6#
- 2.Qc4#
- 2.Qe4#
- 2.Qg8#
- 1...Sb2
- 2.Qe6#
- 2.Qd4#
- 2.Qe4#
- 1...Sdf2
- 2.Qe6#
- 2.Qc4#
- 2.Qd4#
- 1...Sc3
- 2.Qe6#
- 2.Qc4#
- 2.Qd4#
- 1...Shf2
- 2.Qe6#
- 2.Qc4#
- 2.Qd4#
- 1...Sf4
- 2.Qf5#
- 2.Qxg5#
- 1...Rf7+!
- threat
- 1.Qxg5+?
- 1...Rf5
- 2.Qd2#
- 2.Qxf5#
- 1...Sxg5!
- 1...Rf5
- 1.c8Q?
- threat
- 2.Sc7#
- 2.Qb7#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 2.Qa8#
- 2.Qg8#
- 1...Bxg2
- 2.Sc7#
- 2.Qb7#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 2.Qa8#
- 1...Sxg1
- 2.Qb7#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 2.Qa8#
- 2.Qg8#
- 1...Se3
- 2.Qc5#
- 1...Bd8
- 2.Qb7#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 2.Qa8#
- 1...Sb2
- 2.Sc3#
- 2.Sc7#
- 2.Qb7#
- 2.Qc5#
- 2.Qc6#
- 2.Qa8#
- 2.Qg8#
- 1...Sdf2
- 2.Qb7#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 2.Qa8#
- 2.Qg8#
- 1...Shf2
- 2.Qb7#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 2.Qa8#
- 2.Qg8#
- 1...Sf4
- 2.Sc7#
- 2.Qb7#
- 2.Qxg5#
- 2.Qc4#
- 2.Qc5#
- 2.Qc6#
- 2.Qa8#
- 1...Be3!
- threat
- 1.c8R?
- threat
- 2.Sc7#
- 2.Rc5#
- 1...Sxg1
- 2.Rc5#
- 1...Se3
- 2.Rc5#
- 1...Bd8
- 2.Rc5#
- 1...Sdf2
- 2.Rc5#
- 1...Shf2
- 2.Rc5#
- 1...Be3!
- threat
- 1.Bd4?
- Keys
- 1.Bh2!
- threat
- 2.Re5#
- 1...Be3
- 2.Qa2#
- 1...Bf4
- 2.Qg8#
- 1...Bf6
- 2.Qg8#
- 1...Se3
- 2.Qd2#
- 1...Sf4
- 2.Qxg5#
- threat
- 1.Bh2!
Anticipated by 50912(1925)
This anticipates 117134(1934), 254644(1934), 50914(1936), 45402(1944-1945)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- B(g);OGATE::QAB(C)
- S(a);N_GUARD::S(E)
- S(a);N_GUARD::S(E),XS(a)
- S(d);N_GUARD::QAR(C),XB(g)
- Tries
- Try
- B(B);
- Threat
- R1(A)
- Vars
- B(g);::QAB(C)
- B(g);OGATE::QAB(C)
- Refutation
- S(a);
- Try
- Q(C);CHECK,N_PINR(c)
- Vars
- R(c);N_GUARD,P_SPINR(c)::QAR2(C),XR(c)
- Refutation
- B(g);XQ(C)
- Try
- Q(C);N_PINR(c)
- Threat
- DUALS(4)
- Vars
- R(c);::QAR1(C)
- R(c);::QAB1(C)
- Refutation
- R(c);CHECK
- Try
- Q(C);CHECK,N_PINR(c),XB(g)
- Refutation
- S(d);XQ(C)
- Try
- P(G);
- Threat
- DUALS(7)
- Vars
- S(a);::QAR1(G)
- Refutation
- B(g);
- Try
- P(G);
- Threat
- DUALS(2)
- Vars
- S(d);XB(B)::R1(G)
- S(a);::R1(G)
- B(g);::R1(G)
- S(d);::R1(G)
- Refutation
- B(g);
- Try
- Actual
- B(B);
- Threat
- R1(A)
- Vars
- B(g);::QAB(C)
- B(g);OGATE::QAB(C)
- S(a);S_CUTB(g)::QAR(C)
- S(d);N_GUARD::QAR(C),XB(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).