MESON Chess Problem Database
Problem Display
PID: 90789 (8/8/4p1p1/2R1B1R1/4k3/4p3/K3Q3/4n3 w - - 0 1)
Haring, Jacobus
Die Schwalbe, 1960
#2
5 + 5
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Sd3
- 2.Qg2#
- 1...Sf3
- 2.Qc2#
- 1...Sd3
- Tries
- 1.Ba1?
- threat
- 2.Rc4#
- 2.Rg4#
- 1...Kf4
- 2.Rg4#
- 2.Qg4#
- 1...Sg2
- 2.Rc4#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Rc4#
- 1...Sf3
- 2.Rg4#
- 1...e5!
- threat
- 1.Bb2?
- threat
- 2.Rc4#
- 2.Rg4#
- 1...Kf4
- 2.Rg4#
- 2.Qg4#
- 1...Sg2
- 2.Rc4#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Rc4#
- 1...Sf3
- 2.Rg4#
- 1...e5!
- threat
- 1.Bh2?
- threat
- 2.Rc4#
- 2.Rg4#
- 1...Kd4
- 2.Rc4#
- 2.Qc4#
- 1...Sg2
- 2.Rc4#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Rc4#
- 1...Sf3
- 2.Rg4#
- 1...e5!
- threat
- 1.Bc3?
- threat
- 2.Rc4#
- 2.Rg4#
- 1...Kf4
- 2.Rg4#
- 2.Qg4#
- 1...Sg2
- 2.Rc4#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Rc4#
- 1...Sf3
- 2.Rg4#
- 1...e5!
- threat
- 1.Bg3?
- threat
- 2.Rc4#
- 2.Rg4#
- 1...Kd4
- 2.Rc4#
- 2.Qc4#
- 1...Sg2
- 2.Rc4#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Rc4#
- 1...Sf3
- 2.Rg4#
- 1...e5!
- threat
- 1.Bd4?
- threat
- 2.Rg4#
- 2.Qxe3#
- 1...Kxd4
- 2.Rc4#
- 2.Qc4#
- 1...Kf4
- 2.Rg4#
- 2.Qg4#
- 2.Qxe3#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Qxe3#
- 1...e5
- 2.Qxe3#
- 1...Sg2!
- threat
- 1.Bf4?
- threat
- 2.Rc4#
- 2.Qxe3#
- 1...Kd4
- 2.Rc4#
- 2.Qc4#
- 2.Qxe3#
- 1...Kxf4
- 2.Rg4#
- 2.Qg4#
- 1...Sg2
- 2.Rc4#
- 1...Sf3
- 2.Qxe3#
- 1...e5
- 2.Qxe3#
- 1...Sc2!
- threat
- 1.Bd6?
- threat
- 2.Rc4#
- 2.Rg4#
- 1...Kd4
- 2.Rc4#
- 2.Rg4#
- 2.Qc4#
- 1...Sg2
- 2.Rc4#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Rc4#
- 1...Sf3
- 2.Rg4#
- 1...e5!
- threat
- 1.Bf6?
- threat
- 2.Rc4#
- 2.Rg4#
- 1...Kf4
- 2.Rc4#
- 2.Rg4#
- 2.Qg4#
- 1...Sg2
- 2.Rc4#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Rc4#
- 1...Sf3
- 2.Rg4#
- 1...e5!
- threat
- 1.Bc7?
- threat
- 2.Rc4#
- 2.Rg4#
- 1...Kd4
- 2.Rc4#
- 2.Qc4#
- 1...Sg2
- 2.Rc4#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Rc4#
- 1...Sf3
- 2.Rg4#
- 1...e5!
- threat
- 1.Bg7?
- threat
- 2.Rc4#
- 2.Rg4#
- 1...Kf4
- 2.Rg4#
- 2.Qg4#
- 1...Sg2
- 2.Rc4#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Rc4#
- 1...Sf3
- 2.Rg4#
- 1...e5!
- threat
- 1.Bb8?
- threat
- 2.Rc4#
- 2.Rg4#
- 1...Kd4
- 2.Rc4#
- 2.Qc4#
- 1...Sg2
- 2.Rc4#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Rc4#
- 1...Sf3
- 2.Rg4#
- 1...e5!
- threat
- 1.Bh8?
- threat
- 2.Rc4#
- 2.Rg4#
- 1...Kf4
- 2.Rg4#
- 2.Qg4#
- 1...Sg2
- 2.Rc4#
- 1...Sc2
- 2.Rg4#
- 1...Sd3
- 2.Rc4#
- 1...Sf3
- 2.Rg4#
- 1...e5!
- threat
- 1.Rg3?
- 1...Kf5
- 2.Qg4#
- 1...Sg2
- 2.Qc2#
- 1...Sc2
- 2.Qxc2#
- 1...Sd3
- 2.Qf3#
- 1...Sf3
- 2.Qc2#
- 1...g5!
- 1...Kf5
- 1.Qd1?
- threat
- 2.Rc4#
- 1...e2
- 2.Qxe2#
- 1...Sd3
- 2.Qh1#
- 1...Sf3
- 2.Qc2#
- 2.Qb1#
- 1...Sc2!
- threat
- 1.Qf1?
- threat
- 2.Rg4#
- 1...e2
- 2.Qxe2#
- 1...Sd3
- 2.Qg2#
- 2.Qh1#
- 1...Sf3
- 2.Qb1#
- 1...Sg2!
- threat
- 1.Qc2+?
- 1...Kf3
- 2.Rg3#
- 1...Sd3
- 2.Qg2#
- 1...Sxc2!
- 1...Kf3
- 1.Qg2+?
- 1...Kd3
- 2.Rc3#
- 1...Sf3
- 2.Qc2#
- 1...Sxg2!
- 1...Kd3
- 1.Ba1?
- Keys
- 1.Rc3!
- 1...Kd5
- 2.Qc4#
- 1...Sg2
- 2.Qxg2#
- 1...Sc2
- 2.Qg2#
- 1...Sd3
- 2.Qg2#
- 1...Sf3
- 2.Qd3#
- 1...Kd5
- 1.Rc3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD,SBLOCK::QAB(B)
- Tries
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::R(E)
- Refutation
- P(d);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::R(E)
- Refutation
- P(d);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::R(E)
- Refutation
- P(d);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::R(E)
- Refutation
- P(d);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::R(E)
- Refutation
- P(d);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(E)
- S(a);::QAR1(B),XP(b)
- P(d);::QAR1(B),XP(b)
- Refutation
- S(a);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::QAR1(B),XP(b)
- P(d);::QAR1(B),XP(b)
- Refutation
- S(a);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::R(E)
- Refutation
- P(d);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::R(E)
- Refutation
- P(d);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::R(E)
- Refutation
- P(d);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::R(E)
- Refutation
- P(d);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::R(E)
- Refutation
- P(d);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- S(a);::R(C)
- S(a);::R(E)
- Refutation
- P(d);
- Try
- R(E);
- Vars
- K(c);N_SPINP(b),S_FLIGHT::QAB1(B)
- S(a);N_GUARD::QAB(B)
- S(a);N_GUARD::QAB(B),XS(a)
- S(a);N_GUARD,SBLOCK::QAB1(B)
- Refutation
- P(e);
- Try
- Q(B);N_PINP(b)
- Threat
- R(C)
- Vars
- P(b);OGATEB::QAR2(B),XP(b)
- S(a);OGATE,SBLOCK::QAB(B)
- Refutation
- S(a);
- Try
- Q(B);N_PINP(b)
- Threat
- R(E)
- Vars
- P(b);OGATEB::QAR2(B),XP(b)
- S(a);OGATE,SBLOCK::QAB(B)
- Refutation
- S(a);
- Try
- Q(B);CHECK,N_PINP(b)
- Vars
- K(c);S_FLIGHT::R1(E)
- S(a);N_GUARD,P_SPINS(a),SBLOCK::QAB(B)
- Refutation
- S(a);XQ(B)
- Try
- Q(B);CHECK,N_PINP(b)
- Vars
- K(c);S_FLIGHT::R1(C)
- S(a);N_GUARD,P_SPINS(a),SBLOCK::QAB(B)
- Refutation
- S(a);XQ(B)
- Try
- Actual
- R(C);
- Vars
- K(c);N_SPINP(b),S_FLIGHT::QAB1(B)
- S(a);N_GUARD::QAB(B),XS(a)
- S(a);N_GUARD::QAB(B)
- S(a);N_GUARD,SBLOCK::QAB1(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).