MESON Chess Problem Database
Problem Display
PID: 188467 (7b/2pQBR1N/6P1/p3k1p1/1pr5/4PP2/qp3NK1/1b6 w - - 0 1)
Beal, Edward W
The Problemist, 1980
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Sg4#
- 1...Rc2
- 2.Rf5#
- 2.Qf5#
- 1...Rc3
- 2.Sg4#
- 1...Rd4
- 2.exd4#
- 1...Re4
- 2.Rf5#
- 2.Qf5#
- 1...Rg4+
- 2.Sxg4#
- 1...Rc5
- 2.Sg4#
- 1...Rc6
- 2.Sg4#
- 1...Bd3
- 2.Sxd3#
- 1...Be4
- 2.Sg4#
- 1...Bf5
- 2.Rxf5#
- 2.Qxf5#
- 1...Bf6
- 2.Bxf6#
- 1...c5
- 2.Qd6#
- 1...c6
- 2.Qd6#
- 1...Rc1
- Tries
- 1.Sxg5?
- threat
- 2.Qe6#
- 1...Rg4+
- 2.Sxg4#
- 1...Rc1
- 2.Sg4#
- 2.Qd4#
- 2.f4#
- 1...Rc2
- 2.Rf5#
- 2.Qf5#
- 2.Qd4#
- 2.f4#
- 1...Rc3
- 2.Sg4#
- 2.Qd4#
- 2.f4#
- 1...Rd4
- 2.Qxd4#
- 2.exd4#
- 1...Re4
- 2.Rf5#
- 2.Qf5#
- 1...Rf4
- 2.exf4#
- 1...Rc5
- 2.Sg4#
- 2.Qd4#
- 2.f4#
- 1...Rc6
- 2.Sg4#
- 2.Qd4#
- 2.f4#
- 1...Bf5
- 2.Rxf5#
- 2.Qxf5#
- 1...Rh4!
- threat
- 1.Bxg5?
- threat
- 2.Re7#
- 1...Rg4+
- 2.Sxg4#
- 1...Rc1
- 2.Sg4#
- 2.Bf4#
- 2.f4#
- 1...Rc2
- 2.Bf4#
- 2.Rf5#
- 2.f4#
- 1...Rc3
- 2.Sg4#
- 2.Bf4#
- 2.f4#
- 1...Rd4
- 2.exd4#
- 1...Re4
- 2.Rf5#
- 1...Rf4
- 2.Bxf4#
- 2.exf4#
- 1...Rc5
- 2.Sg4#
- 2.Bf4#
- 2.f4#
- 1...Rc6
- 2.Sg4#
- 2.Bf4#
- 2.f4#
- 1...Bf5
- 2.Rxf5#
- 1...Bf6
- 2.Bxf6#
- 1...Rh4!
- threat
- 1.Rf4?
- threat
- 2.Sg4#
- 1...Rc2
- 2.Re4#
- 2.Rf5#
- 2.Qf5#
- 1...Bf5
- 2.Rxf5#
- 2.Qxf5#
- 1...g4
- 2.Sxg4#
- 1...Rxf4!
- threat
- 1.Qd4+?
- 1...Ke6
- 2.Sxg5#
- 2.Sf8#
- 1...Rxd4!
- 1...Ke6
- 1.Qxc7+?
- 1...Kd5
- 2.Qd6#
- 1...Ke6
- 2.Qd6#
- 1...Rxc7!
- 1...Kd5
- 1.e4?
- threat
- 2.Sg4#
- 2.Rf5#
- 2.Qd5#
- 1...Rxe4
- 2.Rf5#
- 1...Bxe4
- 2.Sg4#
- 1...Rc1
- 2.Sg4#
- 2.Rf5#
- 1...Rc2
- 2.Rf5#
- 1...Rc3
- 2.Sg4#
- 2.Rf5#
- 1...Rd4
- 2.Sg4#
- 2.Rf5#
- 2.Qf5#
- 1...Rc5
- 2.Sg4#
- 2.Rf5#
- 1...Rc6
- 2.Sg4#
- 2.Rf5#
- 1...g4
- 2.Sxg4#
- 2.Rf5#
- 2.Qd5#
- 2.f4#
- 1...c6
- 2.Sg4#
- 2.Rf5#
- 2.Qd6#
- 1...Bf6!
- threat
- 1.Sxg5?
- Keys
- 1.Bd8!
- threat
- 2.Re7#
- 1...Rg4+
- 2.Sxg4#
- 1...Rh4
- 2.Bxc7#
- 1...Rc1
- 2.Sg4#
- 1...Rc2
- 2.Rf5#
- 1...Rc3
- 2.Sg4#
- 1...Rd4
- 2.exd4#
- 1...Re4
- 2.Bxc7#
- 2.Rf5#
- 1...Rf4
- 2.Bxc7#
- 1...Rc5
- 2.Sg4#
- 1...Rc6
- 2.Sg4#
- 1...Bf5
- 2.Rxf5#
- 1...Bf6
- 2.Bxf6#
- threat
- 1.Bd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 4
- Sets
- R(e);N_GUARD::S(A)
- R(e);OGATE::P(C),XR(e)
- R(e);CHECK,N_GUARD::S(A),XR(e)
- B(a);N_GUARD::S(A),XB(a)
- B(a);P_PINP(D),S_CUTR(e)::S(A)
- B(j);N_GUARD::B(G),XB(j)
- P(i);N_GUARD::QAB1(F)
- Tries
- Try
- S(I);XP(h)
- Threat
- QAR1(F)
- Vars
- R(e);CHECK,N_GUARD::S(A),XR(e)
- R(e);OGATE::P(C),XR(e)
- Refutation
- R(e);
- Try
- B(G);XP(h)
- Threat
- R(H)
- Vars
- R(e);CHECK,N_GUARD::S(A),XR(e)
- R(e);OGATE::P(C),XR(e)
- R(e);S_CUTB(a)::R1(H)
- B(a);N_GUARD::R1(H),XB(a)
- B(j);N_GUARD::B(G),XB(j)
- Refutation
- R(e);
- Try
- R(H);
- Threat
- S(A)
- Vars
- P(h);::S(A),XP(h)
- Refutation
- R(e);XR(H)
- Try
- Q(F);CHECK
- Refutation
- R(e);XQ(F)
- Try
- Q(F);CHECK,XP(i)
- Vars
- K(g);P-FLIGHT::QAR1(F)
- Refutation
- R(e);XQ(F)
- Try
- P(C);
- Threat
- DUALS(3)
- Vars
- R(e);XP(C)::R1(H)
- B(a);P_PINP(D),XP(C)::S(A)
- R(e);P_PINS(A)::R1(H)
- Refutation
- B(j);
- Try
- Actual
- B(G);
- Threat
- R(H)
- Vars
- R(e);CHECK,N_GUARD::S(A),XR(e)
- R(e);N_GUARD::B(G),XP(i)
- R(e);N_GUARD::S(A)
- R(e);P_PINS(A),S_CUTB(a)::R1(H)
- R(e);OGATE::P(C),XR(e)
- B(a);N_GUARD::R1(H),XB(a)
- B(j);N_GUARD::B(G),XB(j)
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).