MESON Chess Problem Database
Problem Display
PID: 225771 (6Q1/Bp1BK3/p3N1p1/3k4/1pN3R1/1r2q3/8/3rR3 w - - 0 1)
Senkus, Raimondas
Praca, 1991
#2
8 + 8
| 3713 | Snap | 2020 |
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Sb6#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Re5#
- 1...Qg1
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Re5#
- 1...Qd2
- 2.Sb6#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Re5#
- 1...Qf2
- 2.Sf4#
- 2.Sc7#
- 2.Re5#
- 1...Qd4
- 2.Sxd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Qf4
- 2.Sb6#
- 2.Sxf4#
- 2.Sc7#
- 1...Qc5+
- 2.Sxc5#
- 1...Qg5+
- 2.Sxg5#
- 1...Qb6
- 2.Sxb6#
- 2.Re5#
- 1...Qh6
- 2.Sb6#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Re5#
- 1...Qxa7
- 2.Re5#
- 1...Qc3
- 2.Sb6#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Qd3
- 2.Sb6#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Re5#
- 1...Qf3
- 2.Sb6#
- 2.Sf4#
- 2.Sc7#
- 2.Re5#
- 1...Qg3
- 2.Sb6#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Qh3
- 2.Sb6#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Re5#
- 1...Qe5
- 2.Sb6#
- 2.Rxe5#
- 1...Qxe6+
- 2.Qxe6#
- 1...b5
- 2.Qa8#
- 1...b6
- 2.Qa8#
- 1...Qc1
- Tries
- 1.Kf8?
- threat
- 2.Sc7#
- 1...Qf2+
- 2.Sf4#
- 1...Qf4+
- 2.Sxf4#
- 1...Qc5+
- 2.Sxc5#
- 1...Qh6+
- 2.Sg7#
- 1...Qf3+
- 2.Sf4#
- 1...Qxa7
- 2.Re5#
- 1...Qxe6
- 2.Re5#
- 2.Qxe6#
- 1...Qb6
- 2.Re5#
- 1...b6!
- threat
- 1.Sxe3+?
- 1...Ke5
- 2.Qg7#
- 2.Qh8#
- 1...Rxe3!
- 1...Ke5
- 1.Bxe3?
- threat
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Rd4
- 2.Rxd4#
- 1...g5
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Qxg5#
- 1...Rxe3!
- threat
- 1.Bb5?
- threat
- 2.Qd8#
- 1...Qc5+
- 2.Sxc5#
- 1...Qg5+
- 2.Sxg5#
- 2.Rxg5#
- 1...Qxe6+
- 2.Qxe6#
- 1...Qf4
- 2.Sb6#
- 2.Sxf4#
- 2.Sc7#
- 1...Qb6
- 2.Sxb6#
- 2.Re5#
- 2.Rg5#
- 1...Qg3
- 2.Sb6#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Qe5
- 2.Sb6#
- 2.Rxe5#
- 1...axb5!
- threat
- 1.Bc6+?
- 1...bxc6
- 2.Qd8#
- 1...Kxc6!
- 1...bxc6
- 1.Rxd1+?
- 1...Qd2
- 2.Sd4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Qd4
- 2.Sxd4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Rdxd4#
- 2.Rgxd4#
- 1...Qd3
- 2.Sd4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Rd3!
- 1...Qd2
- 1.Rxe3?
- threat
- 2.Sb6#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Re5#
- 1...Rd4
- 2.Sb6#
- 2.Sxd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Rxd4#
- 1...b6
- 2.Sxb6#
- 2.Re5#
- 2.Qa8#
- 1...Re1
- 2.Sb6#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Rd4#
- 1...Rf1
- 2.Sb6#
- 2.Sf4#
- 2.Sc7#
- 2.Re5#
- 2.Rd4#
- 1...g5
- 2.Sb6#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Re5#
- 2.Qxg5#
- 1...Rxe3!
- threat
- 1.Rd4+?
- 1...Qxd4
- 2.Sxd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Rxd4!
- 1...Qxd4
- 1.Qc8?
- threat
- 2.Qxb7#
- 1...Qc5+
- 2.Qxc5#
- 1...Qg5+
- 2.Rxg5#
- 1...Qxe6+
- 2.Bxe6#
- 1...Qxa7
- 2.Re5#
- 2.Rg5#
- 1...b6
- 2.Bc6#
- 2.Qb7#
- 2.Qc6#
- 2.Qa8#
- 1...Qf4
- 2.Sb6#
- 2.Sxf4#
- 2.Qc5#
- 1...Qb6
- 2.Sxb6#
- 2.Re5#
- 2.Rg5#
- 1...Qe4
- 2.Qc5#
- 1...Rd4
- 2.Qc5#
- 1...b5
- 2.Bc6#
- 2.Qb7#
- 2.Qc6#
- 2.Qa8#
- 1...Qd4!
- threat
- 1.Kf8?
- Keys
- 1.Kf6!
- threat
- 2.Sc7#
- 1...Qf2+
- 2.Sf4#
- 1...Qd4+
- 2.Sxd4#
- 1...Qf4+
- 2.Sxf4#
- 1...Qg5+
- 2.Sxg5#
- 1...Qc3+
- 2.Sd4#
- 1...Qf3+
- 2.Sf4#
- 1...Qe5+
- 2.Rxe5#
- 1...Qxe6+
- 2.Qxe6#
- 1...Qxa7
- 2.Re5#
- 1...Qb6
- 2.Re5#
- 1...b6
- 2.Qa8#
- threat
- 1.Kf6!
Anticipated by 18894(1959)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 2
- Sets
- Q(c);CHECK,N_PINS(D)::QAB(H)+S(D),XQ(c)
- Q(c);N_PINS(D),OGATE,XB(E)::R1(A)
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(D)::QAB1(H),XQ(c)
- P(h);OGATEB::QAB(H)
- Tries
- Try
- K(G);N_SPINS(D),S_FLIGHT
- Threat
- QAB(H)+S(D),DCHECK
- Vars
- Q(c);CHECK::QAB(H)+S(D),DCHECK
- Q(c);CHECK::QAB(H)+S(D),DCHECK,XQ(c)
- Q(c);CHECK,N_GUARD::QAB(H)+S(D),XQ(c)
- Q(c);CHECK,N_GUARD::QAB(H)+S(D)
- Q(c);OGATE,XB(E)::R1(A)
- Q(c);OGATE::R1(A)
- Refutation
- P(h);
- Try
- S(B);CHECK,N_SPINS(D),XQ(c)
- Refutation
- R(b);P_PINS(D),XS(B)
- Try
- B(E);N_SPINS(D),XQ(c)
- Threat
- DUALS(6)
- Vars
- R(a);N_GUARD::R1(C),XR(a)
- Refutation
- R(b);P_PINS(D),XB(E)
- Try
- B(F);
- Threat
- QAR(H)
- Vars
- Q(c);CHECK,N_PINS(D)::QAB(H)+S(D),XQ(c)
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(D)::QAB1(H),XQ(c)
- Refutation
- P(f);XB(F)
- Try
- B(F);CHECK
- Vars
- P(h);SBLOCK,XB(F)::QAR(H)
- Refutation
- K(e);S_FLIGHT,XB(F)
- Try
- R(A);CHECK,XR(a)
- Refutation
- R(b);P_SPINR(b)
- Try
- R(A);N_SPINS(D),XQ(c)
- Threat
- DUALS(10)
- Refutation
- R(b);P_PINS(D),XR(A)
- Try
- R(C);CHECK
- Refutation
- R(a);XR(C)
- Try
- Q(H);
- Threat
- QAB(H),XP(h)
- Vars
- Q(c);CHECK,N_GUARD,N_PINS(D)::QAR1(H),XQ(c)
- Q(c);CHECK,N_GUARD,N_PINS(D)::R(C),XQ(c)
- Q(c);CHECK,OGATE,XS(D)::B(F),XQ(c)
- Q(c);N_GUARD::QAR1(H)
- R(a);S_CUTQ(c)::QAR1(H)
- Refutation
- Q(c);N_PINS(D)
- Try
- Actual
- K(G);N_SPINS(D),S_FLIGHT
- Threat
- QAB(H)+S(D),DCHECK
- Vars
- Q(c);CHECK::QAB(H)+S(D),DCHECK
- Q(c);CHECK,N_GUARD::QAB(H)+S(D),XQ(c)
- Q(c);CHECK::QAB(H)+S(D),DCHECK,XQ(c)
- Q(c);CHECK,N_GUARD::QAB(H)+S(D)
- Q(c);CHECK,OGATE::R1(A),XQ(c)
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(D)::QAB1(H),XQ(c)
- Q(c);OGATE,XB(E)::R1(A)
- Q(c);OGATE,P_PINS(D)::R1(A)
- P(h);OGATEB::QAB(H)
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).