MESON Chess Problem Database
Problem Display
PID: 108376 (3K3b/1Bp1P3/1p1kp1RN/8/b6R/2BN4/8/5r2 w - - 0 1)
Hall, James S
Vancouver Province, 1956
#2
8 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sf5#
- 2.Sf7#
- 1...Rb1
- 2.Sf5#
- 2.Sf7#
- 1...Rc1
- 2.Sf5#
- 2.Sf7#
- 1...Rd1
- 2.Sf5#
- 2.Sf7#
- 1...Re1
- 2.Sf5#
- 2.Sf7#
- 1...Rg1
- 2.Sf5#
- 2.Sf7#
- 1...Rh1
- 2.Sf5#
- 2.Sf7#
- 1...Rf5
- 2.Sxf5#
- 1...Rf6
- 2.Be5#
- 2.Rd4#
- 1...Rf7
- 2.Sxf7#
- 1...Rf8+
- 2.exf8Q#
- 2.exf8B#
- 1...Bd1
- 2.e8S#
- 1...Bc2
- 2.e8S#
- 1...Bb3
- 2.e8S#
- 1...Bd4
- 2.Rxd4#
- 1...Be5
- 2.Bxe5#
- 1...Bf6
- 2.Sf7#
- 1...b5
- 2.e8S#
- 1...Ra1
- Tries
- 1.Bf6?
- threat
- 2.Sf7#
- 2.Rd4#
- 1...Rxf6
- 2.Rd4#
- 1...Bxf6
- 2.Sf7#
- 1...e5
- 2.Bxe5#
- 1...c6
- 2.Rd4#
- 1...Rf4
- 2.Sf7#
- 1...Rf5
- 2.Sf7#
- 1...Bb3
- 2.Sf7#
- 2.e8S#
- 1...Be8
- 2.Rd4#
- 1...c5
- 2.Sf7#
- 1...Bc6!
- threat
- 1.Bxh8?
- threat
- 2.Be5#
- 2.Rd4#
- 1...Rf8+
- 2.exf8Q#
- 2.exf8B#
- 1...c6
- 2.Rd4#
- 1...Re1
- 2.Sf5#
- 2.Sf7#
- 2.Rd4#
- 1...Rf4
- 2.Be5#
- 1...Rf5
- 2.Sxf5#
- 1...Rf6
- 2.Rd4#
- 1...Bb3
- 2.Be5#
- 2.e8S#
- 1...c5
- 2.Be5#
- 1...Bc6!
- threat
- 1.Bf3?
- threat
- 2.Sf5#
- 2.Sf7#
- 1...Be8
- 2.Sf5#
- 1...Bf6
- 2.Sf7#
- 1...Rxf3!
- threat
- 1.Rxa4?
- threat
- 2.e8S#
- 1...Rf8+
- 2.exf8Q#
- 2.exf8B#
- 1...Bf6
- 2.Sf7#
- 1...c6!
- threat
- 1.Rf6?
- threat
- 2.Sf7#
- 2.Be5#
- 2.Rd4#
- 1...Rxf6
- 2.Be5#
- 2.Rd4#
- 1...Bxf6
- 2.Sf7#
- 1...c6
- 2.Rd4#
- 1...Re1
- 2.Sf5#
- 2.Sf7#
- 2.Rd4#
- 1...Rf4
- 2.Sf7#
- 2.Be5#
- 1...Rf5
- 2.Sxf5#
- 2.Sf7#
- 1...Bb3
- 2.Sf7#
- 2.Be5#
- 2.e8S#
- 1...Be8
- 2.Be5#
- 2.Rd4#
- 1...c5
- 2.Sf7#
- 2.Be5#
- 1...Bc6!
- threat
- 1.Bf6?
- Keys
- 1.Rh5!
- threat
- 2.Rd5#
- 1...Rf8+
- 2.exf8Q#
- 2.exf8B#
- 1...Rf5
- 2.Sxf5#
- 1...Rf6
- 2.Be5#
- 1...Bb3
- 2.e8S#
- 1...Bc6
- 2.Bb4#
- 1...Be5
- 2.Bxe5#
- 1...Bf6
- 2.Sf7#
- 1...c6
- 2.e8S#
- threat
- 1.Rh5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- R(a);N_GUARD::S(E),XR(a)
- R(a);CHECK,OGATE::PXR(a)=Q
- B(b);N_GUARD::P=S
- B(g);N_GUARD::R(C),XB(g)
- B(g);N_GUARD::B(A),XB(g)
- B(g);N_SPINP(e),P_PINP(G),S_CUTR(a)::S(E)
- P(c);S_CUTB(b)::P=S
- Tries
- Try
- B(A);N_PINP(e)
- Threat
- DUALS(2)
- Vars
- R(a);XB(A)::R(C)
- B(g);P_PINP(G),XB(A)::S(E)
- P(e);::R(D)+B(A),DCHECK,XP(e)
- P(f);::R(C)
- R(a);::S(E)
- B(b);::R(C)
- P(f);::S(E)
- Refutation
- B(b);
- Try
- B(A);XB(g)
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,OGATE::PXR(a)=Q
- P(f);::R(C)
- R(a);::B(A)
- R(a);N_GUARD::S(E),XR(a)
- R(a);N_SPINP(e)::R(C)
- P(f);::B(A)
- Refutation
- B(b);
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- B(b);::S(E)
- B(g);N_SPINP(e),P_PINP(G)::S(E)
- Refutation
- R(a);XB(F)
- Try
- R(C);XB(b)
- Threat
- P=S
- Vars
- R(a);CHECK,OGATE::PXR(a)=Q
- B(g);N_SPINP(e),P_PINP(G),S_CUTR(a)::S(E)
- Refutation
- P(f);
- Try
- R(D);
- Threat
- DUALS(3)
- Vars
- B(g);N_SPINP(e),P_PINP(G),XR(D)::S(E)
- P(f);::R(C)
- Refutation
- B(b);
- Try
- Actual
- R(C);
- Threat
- R1(C)
- Vars
- R(a);CHECK,OGATE::PXR(a)=Q
- R(a);N_GUARD::S(E),XR(a)
- R(a);N_SPINP(e),S_CUTB(g)::B(A)
- B(b);N_GUARD::P=S
- B(b);S_CUTP(f)::B(A)
- B(g);N_GUARD::B(A),XB(g)
- B(g);N_SPINP(e),P_PINP(G),S_CUTR(a)::S(E)
- P(f);S_CUTB(b)::P=S
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).