MESON Chess Problem Database
Problem Display
PID: 10734 (4r3/P2Bb2N/3p1rb1/1PPk1q1Q/R2PN1p1/3K4/8/B2R4 w - - 0 1)
Boyer, Jean-Pierre
di Scala, Pascal
Stella Polaris, 1967
#2
12 + 8
SOLUTION
- SOUND
- Sets
- 1...Re6
- 2.Bc6#
- 1...Bd8
- 2.a8Q#
- 2.a8B#
- 1...Bf8
- 2.Sxf6#
- 1...Re6
- Tries
- 1.Ke3?
- threat
- 2.Sc3#
- 1...dxc5
- 2.dxc5#
- 1...Qe5
- 2.dxe5#
- 1...Re6
- 2.Bc6#
- 1...Bd8
- 2.a8Q#
- 2.a8B#
- 1...Bf8
- 2.Sxf6#
- 1...Qg5+!
- threat
- 1.Qxf5+?
- 1...Rxf5
- 2.Sc3#
- 1...Bxf5!
- 1...Rxf5
- 1.Ke3?
- Keys
- 1.Ke2!
- threat
- 2.Sc3#
- 1...Kxe4
- 2.d5#
- 1...dxc5
- 2.dxc5#
- 1...Qe5
- 2.dxe5#
- 1...Re6
- 2.Bc6#
- 1...Bd8
- 2.a8Q#
- 2.a8B#
- 1...Bf8
- 2.Sxf6#
- threat
- 1.Ke2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(e);SBLOCK::B(K)
- B(g);S_CUTR(h)::P=Q
- B(g);N_GUARD::S(L),XR(e)
- Tries
- Try
- K(C);N_SPINS(F),P-FLIGHT
- Threat
- S(F)
- Vars
- P(d);OGATE,XP(H)::R(B)+P(E),XP(d)
- Q(c);OGATE,P_PINS(F)::R(B)+P(E),XQ(c)
- R(e);P_PINS(F),SBLOCK::B(K)
- B(g);P_PINS(F),S_CUTR(h)::P=Q
- B(g);N_GUARD,P_PINS(F)::S(L),XR(e)
- Refutation
- Q(c);CHECK
- Try
- Q(I);CHECK,N_SPINS(F),XQ(c)
- Vars
- R(e);XQ(I)::S(F)
- Refutation
- B(f);P_PINS(F),XQ(I)
- Try
- Actual
- K(C);N_SPINS(F),S_FLIGHT
- Threat
- S(F)
- Vars
- K(b);N_SPINQ(c),OGATE,S_FLIGHT,XS(F)::R(D)+P(E)
- P(d);OGATE,XP(H)::R(B)+P(E),XP(d)
- Q(c);OGATE,P_PINS(F)::R(B)+P(E),XQ(c)
- R(e);P_PINS(F),SBLOCK::B(K)
- B(g);P_PINS(F),S_CUTR(h)::P=Q
- B(g);N_GUARD,P_PINS(F)::S(L),XR(e)
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).