MESON Chess Problem Database
Problem Display
PID: 228908 (3R4/3q1P2/8/2r2Rb1/Q1Bk3r/1P1N1bN1/P1K1n3/2B5 w - - 0 1)
Cristoffanini, Guido
La Strategie, 1926
#2
11 + 7
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxc4+
- 2.Qxc4#
- 1...Rb5
- 2.Bxb5#
- 1...Rd5
- 2.Bb5#
- 1...Re5
- 2.Be6#
- 1...Rxf5
- 2.Be6#
- 1...Be4
- 2.Sxe2#
- 1...Rxc4+
- Tries
- 1.Rxd7+?
- 1...Rd5
- 2.Bb5#
- 2.Bxd5#
- 2.Ba6#
- 2.Qa7#
- 1...Bd5!
- 1...Rd5
- 1.Qxd7+?
- 1...Rd5
- 2.Qa7#
- 1...Bd5!
- 1...Rd5
- 1.Rxd7+?
- Keys
- 1.Re5!
- threat
- 2.Sf5#
- 1...Rxc4+
- 2.Qxc4#
- 1...Rxe5
- 2.Be6#
- 1...Bxd8
- 2.Be3#
- 1...Sxg3
- 2.Bb2#
- 1...Rf4
- 2.Be3#
- 1...Rd5
- 2.Bb5#
- 1...Be4
- 2.Sxe2#
- 1...Bg4
- 2.Re4#
- 1...Bd5
- 2.Sxe2#
- threat
- 1.Re5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 2
- Sets
- R(e);CHECK,OGATE,P_SPINR(e),XB(H)::QAR1(G),XR(e)
- R(e);N_PINB(H)::QAR(G)+B(H),XR(e)
- R(e);N_PINB(H),N_SPINQ(g)::QAR(G)+B(H)
- R(e);N_PINB(H)::QAR(G)+B(H)
- R(e);N_PINB(H),XR(I)::QAR(G)+B(H)
- B(b);N_GUARD,P_PINS(E),SBLOCK::S(F),XS(a)
- Tries
- Try
- R(K);CHECK,XQ(g)
- Refutation
- B(b);P_SPINB(b)
- Try
- Q(G);CHECK,XQ(g)
- Vars
- R(e);N_PINB(H),P_SPINR(e),S_CUTB(b),S_CUTB(f)::QAB(G)
- Refutation
- B(b);P_SPINB(b)
- Try
- Actual
- R(I);
- Threat
- S(F)
- Vars
- R(e);CHECK,OGATE,P_SPINR(e),XB(H)::QAR1(G),XR(e)
- R(e);N_PINB(H),XR(I)::QAR(G)+B(H)
- B(f);N_GUARD,N_SPINQ(g),XR(K)::B(A)
- S(a);N_GUARD,XS(F)::B(A)
- R(d);S_CUTB(f)::B(A)
- R(e);N_PINB(H),N_SPINQ(g)::QAR(G)+B(H)
- B(b);N_GUARD,P_PINS(E)::S(F),XS(a)
- B(b);N_GUARD,S_CUTR(d)::R1(I)
- B(b);N_GUARD,N_SPINQ(g)::S(F),XS(a)
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).