MESON Chess Problem Database
Problem Display
PID: 34186 (Kb1n3B/1N6/R7/1r1k4/8/8/3nR3/2QN4 w - - 0 1)
Stocchi, Ottavio
1st Prize, Polish Problem Association, 1950
#2
7 + 5
| 3100 | Selected Stocchi (I) | 2001 |
| 56 | The Problemist | 2002 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Qc5#
- 1...Rb2
- 2.Qc5#
- 1...Rb3
- 2.Qc5#
- 1...Rb4
- 2.Qc5#
- 1...Ra5
- 2.Rxa5#
- 1...Rc5
- 2.Qxc5#
- 1...Rb6
- 2.Qc5#
- 1...Bd6
- 2.Rxd6#
- 1...Ba7
- 2.Rd6#
- 1...Sc4
- 2.Sc3#
- 1...Se4
- 2.Se3#
- 1...Sc6
- 2.Qxc6#
- 1...Se6
- 2.Qc6#
- 1...Sxb7
- 2.Qc6#
- 1...Sf7
- 2.Qc6#
- 1...Rb1
- Tries
- 1.Kxb8?
- threat
- 2.Rd6#
- 1...Sc6+
- 2.Qxc6#
- 1...Sxb7
- 2.Qc6#
- 1...Rb6
- 2.Qc5#
- 1...Sc4
- 2.Sc3#
- 1...Se4
- 2.Se3#
- 1...Sf7
- 2.Qc6#
- 1...Rxb7+!
- threat
- 1.Re5+?
- 1...Kd4
- 2.Qc3#
- 1...Bxe5!
- 1...Kd4
- 1.Qc2?
- threat
- 2.Se3#
- 2.Rxd2#
- 2.Qd3#
- 1...Rxb7
- 2.Se3#
- 2.Rxd2#
- 1...Sxb7
- 2.Se3#
- 2.Rxd2#
- 2.Qc6#
- 1...Bf4
- 2.Qd3#
- 1...Rb3
- 2.Qc5#
- 1...Rb4
- 2.Se3#
- 2.Qc5#
- 1...Rb6
- 2.Qc5#
- 1...Bd6
- 2.Rxd6#
- 2.Qd3#
- 1...Ba7
- 2.Rd6#
- 1...Sb1
- 2.Se3#
- 2.Qd3#
- 2.Qe4#
- 1...Sf1
- 2.Qd3#
- 2.Qe4#
- 1...Sb3
- 2.Se3#
- 2.Qe4#
- 1...Sf3
- 2.Se3#
- 2.Qe4#
- 1...Sc4
- 2.Sc3#
- 2.Qd3#
- 2.Qe4#
- 1...Se4
- 2.Se3#
- 2.Qd3#
- 2.Qxe4#
- 1...Sc6
- 2.Qxc6#
- 1...Se6
- 2.Se3#
- 2.Qc6#
- 1...Be5!
- threat
- 1.Qc4+?
- 1...Sxc4
- 2.Sc3#
- 1...Kxc4!
- 1...Sxc4
- 1.Qc7?
- threat
- 2.Sc3#
- 2.Rd6#
- 1...Sxb7
- 2.Sc3#
- 2.Qc6#
- 1...Rc5
- 2.Qxc5#
- 1...Sc6
- 2.Qxc6#
- 2.Qf7#
- 1...Rb3
- 2.Rd6#
- 2.Qc5#
- 1...Ra5
- 2.Sc3#
- 2.Rxa5#
- 1...Rb6
- 2.Sc3#
- 2.Qc5#
- 1...Sb1
- 2.Rd6#
- 1...Sc4
- 2.Sc3#
- 1...Se4
- 2.Se3#
- 1...Sf7
- 2.Sc3#
- 2.Qc6#
- 2.Qxf7#
- 1...Bxc7!
- threat
- 1.Kxb8?
- Keys
- 1.Ra4!
- threat
- 2.Rd4#
- 1...Ra5+
- 2.Rxa5#
- 1...Rc5
- 2.Qxc5#
- 1...Be5
- 2.Rxe5#
- 1...Sc4
- 2.Qxc4#
- 1...Se4
- 2.Qc4#
- 1...Rb4
- 2.Qc5#
- 1...Ba7
- 2.Re5#
- 1...Sb3
- 2.Qc4#
- 1...Sf3
- 2.Qc4#
- 1...Sc6
- 2.Sc3#
- 1...Se6
- 2.Se3#
- threat
- 1.Ra4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- R(b);N_GUARD::QAR1(A)
- R(b);OGATEB,P_PINR(D)::R(D),XR(b)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(d);N_GUARD::R1(D),XB(d)
- B(d);N_GUARD::R1(D)
- S(a);SBLOCK::S(B)
- S(e);N_GUARD::QAB1(A),XS(e)
- S(e);N_GUARD::QAB1(A)
- S(e);N_GUARD,XS(E)::QAB1(A)
- Tries
- Try
- K(F);P-FLIGHT,P_SPINS(E),XB(d)
- Threat
- R1(D)
- Vars
- S(e);CHECK,N_GUARD::QAB1(A),XS(e)
- S(e);N_GUARD,XS(E)::QAB1(A)
- R(b);N_GUARD::QAR1(A)
- S(a);SBLOCK::S(B)
- S(e);N_GUARD::QAB1(A)
- Refutation
- R(b);CHECK,XS(E)
- Try
- R(C);CHECK
- Vars
- K(c);P-FLIGHT::QAB1(A)
- Refutation
- B(d);XR(C)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- B(d);::QAR2(A)
- R(b);N_GUARD::QAR1(A)
- B(d);N_GUARD::R1(D)
- S(e);N_GUARD::QAB1(A),XS(e)
- Refutation
- B(d);
- Try
- Q(A);CHECK
- Vars
- S(a);SBLOCK,XQ(A)::S(B)
- Refutation
- K(c);S_FLIGHT,XQ(A)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(b);N_GUARD::QAR1(A),XR(b)
- S(a);::R1(D)
- S(a);::S(B)
- S(a);SBLOCK::S(B)
- Refutation
- B(d);XQ(A)
- Try
- Actual
- R(D);
- Threat
- R1(D)
- Vars
- R(b);CHECK,OGATEB::R(D),XR(b)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(d);N_GUARD::R1(C),XB(d)
- S(a);N_GUARD::QAB1(A),XS(a)
- S(a);N_GUARD::QAB1(A)
- R(b);N_GUARD::QAR1(A)
- B(d);N_GUARD::R1(C)
- S(e);SBLOCK::S(B)
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).