MESON Chess Problem Database
Problem Display
PID: 17197 (8/8/3Kn1B1/8/2k5/Qp2P3/4R3/8 w - - 0 1)
Chepurnov, Anatol Alexeivich
Karjala, 1925
#2
5 + 3
SOLUTION
- SOUND
- Sets
- 1...Kc3
- 2.Rc2#
- 1...Sd4
- 2.Qc5#
- 1...Sf4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 1...Sg7
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b2
- 2.Bd3#
- 1...Kc3
- Tries
- 1.Kxe6?
- 1...Kc3
- 2.Rc2#
- 2.Qc5#
- 1...b2
- 2.Bd3#
- 1...Kb5!
- 1...Kc3
- 1.Be4?
- 1...Kc3
- 2.Rc2#
- 1...Sd4
- 2.Qc5#
- 1...Sf4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 1...Sg7
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b2
- 2.Bd3#
- 1...Kb5!
- 1...Kc3
- 1.Bf5?
- 1...Kc3
- 2.Rc2#
- 1...Sd4
- 2.Qc5#
- 1...Sf4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 1...Sg7
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b2
- 2.Bd3#
- 1...Kb5!
- 1...Kc3
- 1.Bh7?
- 1...Kc3
- 2.Rc2#
- 1...Sd4
- 2.Qc5#
- 1...Sf4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 1...Sg7
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b2
- 2.Bd3#
- 1...Kb5!
- 1...Kc3
- 1.Rb2?
- threat
- 2.Qxb3#
- 1...Kc3
- 2.Rc2#
- 2.Qxb3#
- 1...Sd4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Kb5!
- threat
- 1.Rc2+?
- 1...bxc2
- 2.Bd3#
- 1...Kb5!
- 1...bxc2
- 1.Rd2?
- 1...Kc3
- 2.Rc2#
- 1...Sd4
- 2.Qc5#
- 1...Sf4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 1...Sg7
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b2
- 2.Bd3#
- 1...Kb5!
- 1...Kc3
- 1.Rf2?
- 1...Kc3
- 2.Rc2#
- 1...Sd4
- 2.Qc5#
- 1...Sf4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 1...Sg7
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b2
- 2.Bd3#
- 1...Kb5!
- 1...Kc3
- 1.Rg2?
- 1...Kc3
- 2.Rc2#
- 1...Sd4
- 2.Qc5#
- 1...Sf4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 1...Sg7
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b2
- 2.Bd3#
- 1...Kb5!
- 1...Kc3
- 1.Rh2?
- 1...Kc3
- 2.Rc2#
- 1...Sd4
- 2.Qc5#
- 1...Sf4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 1...Sg7
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b2
- 2.Bd3#
- 1...Kb5!
- 1...Kc3
- 1.Qa5?
- 1...Sd4
- 2.Qc5#
- 1...Sf4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 1...Sg7
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b2!
- 1...Sd4
- 1.Kxe6?
- Keys
- 1.Ra2!
- 1...Kc3
- 2.Rc2#
- 1...Kb5
- 2.Qxb3#
- 1...bxa2
- 2.Bd3#
- 1...Sd4
- 2.Qc5#
- 1...Sf4
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 1...Sg7
- 2.Qc5#
- 1...Sd8
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...b2
- 2.Bd3#
- 1...Kc3
- 1.Ra2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- K(b);P-FLIGHT,P_SPINP(a)::R1(A)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(a);::B(E)
- Tries
- Try
- K(D);P-FLIGHT,XS(c)
- Vars
- P(a);::B(E)
- Refutation
- K(b);S_FLIGHT
- Try
- B(E);
- Vars
- K(b);P-FLIGHT,P_SPINP(a)::R1(A)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(a);::B(E)
- Refutation
- K(b);S_FLIGHT
- Try
- B(E);
- Vars
- K(b);P-FLIGHT,P_SPINP(a)::R1(A)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(a);::B(E)
- Refutation
- K(b);S_FLIGHT
- Try
- B(E);
- Vars
- K(b);P-FLIGHT,P_SPINP(a)::R1(A)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(a);::B(E)
- Refutation
- K(b);S_FLIGHT
- Try
- R(A);
- Threat
- QAB1(B),XP(a)
- Vars
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- Refutation
- K(b);P_SPINP(a),S_FLIGHT
- Try
- R(A);CHECK
- Vars
- P(a);XR(A)::B(E)
- Refutation
- K(b);S_FLIGHT
- Try
- R(A);
- Vars
- K(b);P-FLIGHT,P_SPINP(a)::R1(A)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(a);::B(E)
- Refutation
- K(b);S_FLIGHT
- Try
- R(A);
- Vars
- K(b);P-FLIGHT,P_SPINP(a)::R1(A)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(a);::B(E)
- Refutation
- K(b);S_FLIGHT
- Try
- R(A);
- Vars
- K(b);P-FLIGHT,P_SPINP(a)::R1(A)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(a);::B(E)
- Refutation
- K(b);S_FLIGHT
- Try
- R(A);
- Vars
- K(b);P-FLIGHT,P_SPINP(a)::R1(A)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(a);::B(E)
- Refutation
- K(b);S_FLIGHT
- Try
- Q(B);
- Vars
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- Refutation
- P(a);
- Try
- Actual
- R(A);
- Vars
- K(b);P-FLIGHT,P_SPINP(a)::R1(A)
- K(b);S_FLIGHT::QAR2(B),XP(a)
- P(a);XR(A)::B(E)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(a);::B(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).