MESON Chess Problem Database
Problem Display
PID: 10798 (2BR2n1/5N2/K6b/2kp3r/1p2Q2r/7b/6p1/2BR4 w - - 0 1)
Froberg, Johan Hilding Laurentius
1st Prize, Revista de Sah, 1968
#2
7 + 9
SOLUTION
- SOUND
- Sets
- 1...Bg4
- 2.Qc2#
- 1...Bf5
- 2.Qxd5#
- 1...Bxc8+
- 2.Rxc8#
- 1...Bxc1
- 2.Rxc1#
- 1...Bf4
- 2.Qc2#
- 1...Bg5
- 2.Qxd5#
- 1...d4
- 2.Qc2#
- 1...Bg4
- Tries
- 1.Be3+?
- 1...Kc6
- 2.Rc1#
- 1...d4
- 2.Rc1#
- 2.Qc2#
- 1...Bxe3!
- 1...Kc6
- 1.Bf4?
- threat
- 2.Rc1#
- 2.Qc2#
- 1...Bxc8+
- 2.Rxc8#
- 1...Kc6
- 2.Rc1#
- 2.Qc2#
- 1...Rxf4
- 2.Rc1#
- 1...Bxf4
- 2.Qc2#
- 1...dxe4
- 2.Rc1#
- 1...g1Q
- 2.Qc2#
- 1...g1R
- 2.Qc2#
- 1...Bf5
- 2.Rc1#
- 2.Qxd5#
- 1...b3
- 2.Rc1#
- 1...Bg7!
- threat
- 1.Bg5?
- threat
- 2.Rc1#
- 2.Qxd5#
- 1...Bxc8+
- 2.Rxc8#
- 1...Kc6
- 2.Rc1#
- 1...Rxg5
- 2.Rc1#
- 1...Bxg5
- 2.Qxd5#
- 1...dxe4
- 2.Rc1#
- 1...g1Q
- 2.Qxd5#
- 1...g1R
- 2.Qxd5#
- 1...Be6
- 2.Rc1#
- 1...Bg7
- 2.Qxd5#
- 1...Sf6
- 2.Rc1#
- 1...Se7
- 2.Rc1#
- 1...b3
- 2.Rc1#
- 1...d4
- 2.Rc1#
- 2.Qc2#
- 2.Qd5#
- 1...Rxe4!
- threat
- 1.Bxh3?
- threat
- 2.Rc8#
- 1...Kc6
- 2.Rc8#
- 1...Bf4
- 2.Qc2#
- 1...Se7!
- threat
- 1.Bf5?
- threat
- 2.Rc8#
- 2.Qxd5#
- 1...Kc6
- 2.Rc8#
- 1...Rxe4
- 2.Rc8#
- 1...Rxf5
- 2.Rc8#
- 1...Bxf5
- 2.Qxd5#
- 1...dxe4
- 2.Rc8#
- 1...Bf4
- 2.Qc2#
- 2.Qxd5#
- 1...Sf6
- 2.Rc8#
- 1...b3
- 2.Rc8#
- 1...d4
- 2.Rc8#
- 2.Qc2#
- 2.Qd5#
- 1...Se7!
- threat
- 1.R1xd5+?
- 1...Rxd5
- 2.Qxd5#
- 1...Kc6!
- 1...Rxd5
- 1.R8xd5+?
- 1...Rxd5
- 2.Qxd5#
- 1...Kc6!
- 1...Rxd5
- 1.Qd4+?
- 1...Kc6
- 2.Qb6#
- 1...Rxd4!
- 1...Kc6
- 1.Be3+?
- Keys
- 1.Bg4!
- threat
- 2.Rc8#
- 2.Qc2#
- 1...Kc6
- 2.Rc8#
- 2.Qc2#
- 1...Rxg4
- 2.Rc8#
- 1...Bxg4
- 2.Qc2#
- 1...dxe4
- 2.Rc8#
- 1...Bd2
- 2.Rc8#
- 1...Bf4
- 2.Qc2#
- 1...Bg7
- 2.Rc8#
- 1...Se7
- 2.Qc2#
- 1...b3
- 2.Rc8#
- threat
- 1.Bg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 5
- Sets
- B(b);S_CUTR(d)::QAR(C)
- B(b);S_CUTR(g)::QAR1(C),XP(f)
- B(b);CHECK,OGATE,XB(F)::R(G),XB(b)
- B(h);OGATE,XB(A)::R(B),XB(h)
- B(h);S_CUTR(d)::QAR(C)
- B(h);S_CUTR(g)::QAR1(C),XP(f)
- P(f);S_CUTR(d)::QAR(C)
- Tries
- Try
- B(A);CHECK
- Vars
- K(e);P-FLIGHT,P_SPINP(f)::R(B)
- Refutation
- B(h);XB(A)
- Try
- B(A);
- Threat
- DUALS(2)
- Vars
- B(b);CHECK,OGATE,XB(F)::R(G),XB(b)
- R(d);XB(A)::R(B)
- B(h);XB(A)::QAR(C)
- P(f);XQ(C)::R(B)
- P(a);::QAR(C)
- P(c);::R(B)
- Refutation
- B(h);
- Try
- B(A);
- Threat
- DUALS(2)
- Vars
- B(b);CHECK,OGATE,XB(F)::R(G),XB(b)
- K(e);P-FLIGHT,P_SPINP(f)::R(B)
- R(g);XB(A)::R(B)
- B(h);XB(A)::QAR1(C),XP(f)
- P(f);XQ(C)::R(B)
- P(a);::QAR1(C),XP(f)
- B(b);::R(B)
- B(h);::QAR1(C),XP(f)
- S(i);::R(B)
- P(c);::R(B)
- Refutation
- R(d);XQ(C)
- Try
- B(F);XB(b)
- Threat
- R(G)
- Vars
- K(e);P-FLIGHT,P_SPINP(f)::R(G)
- B(h);S_CUTR(d)::QAR(C)
- Refutation
- S(i);
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- K(e);P-FLIGHT,P_SPINP(f)::R(G)
- R(d);XQ(C)::R(G)
- R(g);XB(F)::R(G)
- B(b);XB(F)::QAR1(C),XP(f)
- P(f);XQ(C)::R(G)
- S(i);::R(G)
- P(c);::R(G)
- Refutation
- S(i);
- Try
- R(B);CHECK,XP(f)
- Vars
- R(g);OGATE,XR(B)::QAR1(C),XR(g)
- Refutation
- K(e);P-FLIGHT
- Try
- R(G);CHECK,XP(f)
- Vars
- R(g);OGATE,XR(G)::QAR1(C),XR(g)
- Refutation
- K(e);P-FLIGHT
- Try
- Q(C);CHECK
- Vars
- K(e);OGATE,P-FLIGHT::QAR1(C)
- Refutation
- R(d);XQ(C)
- Try
- Actual
- B(F);
- Threat
- DUALS(2)
- Vars
- R(d);XB(F)::R(G)
- B(b);XB(F)::QAR(C)
- P(f);XQ(C)::R(G)
- B(h);::R(G)
- B(h);::QAR(C)
- S(i);::QAR(C)
- P(c);::R(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).