MESON Chess Problem Database
Problem Display
PID: 231170 (8/2p5/2Q5/pr2P1p1/b2kN1Kp/1pN4R/1P6/8 w - - 0 1)
Cristoffanini, Guido
3rd Prize, Il Secolo, 1927
#2
7 + 8
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Kxe5
- 2.Qf6#
- 1...Rb4
- 2.Qd5#
- 2.Qc5#
- 1...Rc5
- 2.Qxc5#
- 1...Rd5
- 2.Qxd5#
- 1...Rxe5
- 2.Se2#
- 2.Qxa4#
- 1...Rb6
- 2.Qd5#
- 2.Qc5#
- 1...Rb7
- 2.Qd5#
- 2.Qc5#
- 1...Rb8
- 2.Qd5#
- 2.Qc5#
- 1...Kxe5
- Tries
- 1.Kf5?
- threat
- 2.Se2#
- 1...Rc5
- 2.Qxc5#
- 1...Rxe5+!
- threat
- 1.Kxg5?
- 1...Kxe5
- 2.Qf6#
- 1...Rc5
- 2.Qxc5#
- 1...Rb4
- 2.Qd5#
- 2.Qc5#
- 1...Rd5
- 2.Qxd5#
- 1...Rb6
- 2.Qd5#
- 2.Qc5#
- 1...Rb7
- 2.Qd5#
- 2.Qc5#
- 1...Rb8
- 2.Qd5#
- 2.Qc5#
- 1...Rxe5+!
- 1...Kxe5
- 1.Kh5?
- 1...Kxe5
- 2.Qf6#
- 1...Rxe5
- 2.Se2#
- 2.Qxa4#
- 1...Rc5
- 2.Qxc5#
- 1...Rb4
- 2.Qd5#
- 2.Qc5#
- 1...Rd5
- 2.Qxd5#
- 1...Rb6
- 2.Qd5#
- 2.Qc5#
- 1...Rb7
- 2.Qd5#
- 2.Qc5#
- 1...Rb8
- 2.Qd5#
- 2.Qc5#
- 1...g4!
- 1...Kxe5
- 1.Sf2?
- 1...Rxe5
- 2.Rd3#
- 1...Rc5
- 2.Qe4#
- 1...Rb4
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Rb6
- 2.Qd5#
- 1...Rb7
- 2.Qd5#
- 1...Rb8
- 2.Qd5#
- 1...Kxe5!
- 1...Rxe5
- 1.Sxg5?
- 1...Kxe5
- 2.Sf3#
- 1...Rc5
- 2.Qe4#
- 1...Rb4
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Rb6
- 2.Qd5#
- 1...Rb7
- 2.Qd5#
- 1...Rb8
- 2.Qd5#
- 1...Rxe5!
- 1...Kxe5
- 1.Rd3+?
- 1...Kxe5
- 2.Qe8#
- 2.Qf6#
- 1...Kxd3!
- 1...Kxe5
- 1.Rf3?
- 1...Kxe5
- 2.Qf6#
- 1...Rxe5
- 2.Se2#
- 2.Qxa4#
- 1...Rc5
- 2.Qxc5#
- 1...Rb4
- 2.Qd5#
- 2.Qc5#
- 1...Rd5
- 2.Qxd5#
- 1...Rb6
- 2.Qd5#
- 2.Qc5#
- 1...Rb7
- 2.Qd5#
- 2.Qc5#
- 1...Rb8
- 2.Qd5#
- 2.Qc5#
- 1...h3!
- 1...Kxe5
- 1.Qxb5?
- threat
- 2.Rd3#
- 2.Qc5#
- 2.Qd5#
- 1...c5
- 2.Qxc5#
- 1...c6
- 2.Rd3#
- 2.Qc5#
- 1...Bxb5!
- threat
- 1.Qd6+?
- 1...Kc4
- 2.Sd2#
- 1...Rd5
- 2.Qxd5#
- 1...cxd6!
- 1...Kc4
- 1.Kf5?
- Keys
- 1.Sd2!
- 1...Kxe5
- 2.Sf3#
- 1...Rxe5
- 2.Qc4#
- 1...Rb4
- 2.Qd5#
- 1...Rc5
- 2.Qe4#
- 1...Rd5
- 2.Qxd5#
- 1...Rb6
- 2.Qd5#
- 1...Rb7
- 2.Qd5#
- 1...Rb8
- 2.Qd5#
- 1...Kxe5
- 1.Sd2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(G)
- R(f);N_GUARD::QAB1(G),XR(f)
- R(f);N_GUARD::QAR1(G),XR(f)
- Tries
- Try
- K(E);P_SPINP(F),S_FLIGHT
- Threat
- S(B)
- Vars
- R(f);N_GUARD::QAB1(G),XR(f)
- Refutation
- R(f);CHECK,XP(F)
- Try
- K(E);P-FLIGHT,P_SPINP(F),XP(g)
- Vars
- K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(G)
- R(f);N_GUARD::QAB1(G),XR(f)
- R(f);N_GUARD::QAR1(G),XR(f)
- Refutation
- R(f);CHECK,XP(F)
- Try
- K(E);S_FLIGHT
- Vars
- K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(G)
- R(f);N_GUARD::QAB1(G),XR(f)
- R(f);N_GUARD::QAR1(G),XR(f)
- Refutation
- P(g);P_PINP(F)
- Try
- S(D);
- Vars
- R(f);SBLOCK,XP(F)::R1(C)
- R(f);SBLOCK::QAR1(G)
- R(f);N_GUARD::QAR1(G)
- R(f);N_GUARD::QAR1(G),XR(f)
- Refutation
- K(c);S_FLIGHT,XP(F)
- Try
- S(D);XP(g)
- Vars
- K(c);S_FLIGHT,XP(F)::S(D)
- R(f);SBLOCK::QAR1(G)
- R(f);N_GUARD::QAR1(G)
- R(f);N_GUARD::QAR1(G),XR(f)
- Refutation
- R(f);XP(F)
- Try
- R(C);CHECK
- Refutation
- K(c);P-FLIGHT,XR(C)
- Try
- R(C);
- Vars
- K(c);OGATEB,S_FLIGHT,XP(F)::QAB1(G)
- R(f);N_GUARD::QAB1(G),XR(f)
- R(f);N_GUARD::QAR1(G),XR(f)
- Refutation
- P(d);
- Try
- Q(G);XR(f)
- Threat
- DUALS(3)
- Vars
- P(h);::QAB1(G),XP(h)
- Refutation
- B(b);XQ(G)
- Try
- Q(G);CHECK
- Vars
- K(c);P-FLIGHT::S(D)
- R(f);N_GUARD,P_SPINR(f)::QAR1(G),XR(f)
- Refutation
- P(h);XQ(G)
- Try
- Actual
- S(D);
- Vars
- K(c);S_FLIGHT,XP(F)::S(D)
- R(f);SBLOCK,XP(F)::QAR1(G)
- R(f);N_GUARD::QAR1(G)
- R(f);SBLOCK::QAR1(G)
- R(f);N_GUARD::QAR1(G),XR(f)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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