MESON Chess Problem Database
Problem Display
PID: 235284 (2Q4b/5n1b/K2p4/1N1B4/1k3qRr/pP6/PN1PP3/8 w - - 0 1)
Hoffmann, Fritz
Schach, 1978
#2
10 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qc4
- 2.Qxc4#
- 1...Qd4
- 2.Qc3#
- 1...Qe4
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 1...Be4
- 2.Qc4#
- 1...Bg8
- 2.Sd3#
- 1...Bc3
- 2.Qxc3#
- 2.dxc3#
- 1...Bd4
- 2.Qc4#
- 1...Se5
- 2.Qc3#
- 1...axb2
- 2.a3#
- 1...Qc4
- Tries
- 1.Sd4?
- threat
- 2.Qc3#
- 2.Qc4#
- 1...Bd3+
- 2.Sxd3#
- 1...Qxd2
- 2.Sc2#
- 2.Qc4#
- 1...Qxd4
- 2.Qc3#
- 1...Bxd4
- 2.Qc4#
- 1...Qe3
- 2.Sc2#
- 2.Qc4#
- 1...Qg3
- 2.Sc2#
- 2.Qc4#
- 1...Qf3
- 2.Sc2#
- 2.Qc4#
- 1...Rh3
- 2.Qc4#
- 1...Se5
- 2.Qc3#
- 1...axb2!
- threat
- 1.Rxf4+?
- 1...Be4
- 2.Sd3#
- 2.Qc4#
- 1...Bd4
- 2.Qc3#
- 2.Qc4#
- 1...Rxf4!
- 1...Be4
- 1.d4?
- threat
- 2.Qc3#
- 2.Qc4#
- 1...Qxd4
- 2.Qc3#
- 1...Bxd4
- 2.Qc4#
- 1...Qd2
- 2.Qc4#
- 1...Qe3
- 2.Qc4#
- 1...Qg3
- 2.Qc4#
- 1...Qf3
- 2.Qc4#
- 1...Rh3
- 2.Qc4#
- 1...Bd3
- 2.Sxd3#
- 2.Qc3#
- 1...Se5
- 2.Qc3#
- 1...Qc1!
- threat
- 1.e4?
- threat
- 2.Sd3#
- 2.Qc4#
- 1...Qxd2
- 2.Qc4#
- 1...Qxe4
- 2.Sd3#
- 1...Bxe4
- 2.Qc4#
- 1...Bxb2
- 2.Qc4#
- 1...axb2
- 2.Qc4#
- 2.a3#
- 1...Qe3
- 2.Qc4#
- 1...Qg3
- 2.Qc4#
- 1...Qf3
- 2.Qc4#
- 1...Rh3
- 2.Qc4#
- 1...Se5
- 2.Qc3#
- 1...Qf1!
- threat
- 1.Sd4?
- Keys
- 1.Be4!
- threat
- 2.Sd3#
- 2.Qc4#
- 1...Qxd2
- 2.Qc4#
- 1...Qxe4
- 2.Sd3#
- 1...Bxe4
- 2.Qc4#
- 1...Bxb2
- 2.Qc4#
- 1...axb2
- 2.Qc4#
- 1...Qe3
- 2.Qc4#
- 1...Qg3
- 2.Qc4#
- 1...Qf3
- 2.Qc4#
- 1...Rh3
- 2.Qc4#
- 1...Se5
- 2.Qc3#
- 1...d5
- 2.Sd3#
- threat
- 1.Be4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 5
- Sets
- Q(c);N_GUARD,P_PINS(G)::QAR1(J),XQ(c)
- Q(c);S_CUTB(h)::QAB1(J)
- Q(c);S_CUTB(g)::S(B)
- B(g);N_GUARD,P_PINS(G)::S(B),XB(g)
- B(g);N_SPINQ(c),S_CUTQ(c)::QAR1(J)
- B(g);N_GUARD::S(B)
- B(h);N_SPINQ(c),S_CUTQ(c)::QAR1(J)
- S(f);S_CUTB(h)::QAB1(J)
- P(a);OGATE,XS(B)::P(A)
- Tries
- Try
- S(G);N_PINQ(c)
- Threat
- DUALS(2)
- Vars
- B(g);CHECK,N_GUARD::S(B),XB(g)
- Q(c);P_SPINQ(c),XS(G)::QAB1(J)
- B(h);XS(G)::QAR1(J)
- R(d);::QAR1(J)
- S(f);::QAB1(J)
- Refutation
- P(a);XS(B)
- Try
- R(F);CHECK,XQ(c)
- Refutation
- R(d);XR(F)
- Try
- P(C);N_PINQ(c)
- Threat
- DUALS(2)
- Vars
- Q(c);P_SPINQ(c),XP(C)::QAB1(J)
- B(h);XP(C)::QAR1(J)
- Q(c);::QAR1(J)
- R(d);::QAR1(J)
- S(f);::QAB1(J)
- Refutation
- Q(c);
- Try
- P(D);N_PINQ(c)
- Threat
- DUALS(2)
- Vars
- Q(c);XP(C)::QAR1(J)
- Q(c);P_SPINQ(c),XP(D)::S(B)
- B(g);XP(D)::QAR1(J)
- B(h);XS(B)::QAR1(J)
- Q(c);::QAR1(J)
- R(d);::QAR1(J)
- S(f);S_CUTB(h)::QAB1(J)
- Refutation
- Q(c);P_PINS(G)
- Try
- Actual
- B(H);N_PINQ(c)
- Threat
- DUALS(2)
- Vars
- Q(c);XP(C)::QAR1(J)
- Q(c);P_SPINQ(c),XB(H)::S(B)
- B(g);XB(H)::QAR1(J)
- B(h);XS(B)::QAR1(J)
- P(a);XS(B)::QAR1(J)
- Q(c);::QAR1(J)
- R(d);::QAR1(J)
- S(f);S_CUTB(h)::QAB1(J)
- P(e);::S(B)
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).