MESON Chess Problem Database
Problem Display
PID: 140221 (4Q3/1B5p/3KNp1B/3p1Rb1/2N1k1P1/3q3r/4PP2/3R3n w - - 0 1)
Rizzetti, Dante Hugo
Probleemblad, 1975
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Qc2
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Qxe2
- 2.Sd4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Qxc4
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Qa3+
- 2.Sc5#
- 1...Qb3
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Qc3
- 2.Sd4#
- 2.Sc5#
- 2.Sxg5#
- 2.Bxd5#
- 1...Qe3
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 1...Qf3
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Qg3+
- 2.Sf4#
- 1...Qd4
- 2.Sxd4#
- 2.Sc5#
- 2.Sxg5#
- 2.Rxd4#
- 1...Rh2
- 2.exd3#
- 1...Rh4
- 2.exd3#
- 1...Rh5
- 2.exd3#
- 1...Rxh6
- 2.exd3#
- 1...Be3
- 2.exd3#
- 1...Bf4+
- 2.Rxf4#
- 1...Bh4
- 2.Rf4#
- 1...Sg3
- 2.exd3#
- 1...Qb1
- Tries
- 1.Kc7?
- threat
- 2.Sd6#
- 1...Qxc4+
- 2.Sc5#
- 1...Qg3+
- 2.Sf4#
- 1...Bf4+
- 2.Rxf4#
- 1...Qc2
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Qa3
- 2.Sc5#
- 2.Sxg5#
- 2.Bxd5#
- 2.Rd4#
- 1...Qc3
- 2.Sd4#
- 2.Sc5#
- 2.Sxg5#
- 2.Bxd5#
- 1...Sxf2!
- threat
- 1.Kd7?
- threat
- 2.Sd6#
- 1...Qxc4
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Qa3
- 2.Sc5#
- 2.Sxg5#
- 2.Bxd5#
- 2.Rd4#
- 1...Qg3
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Bxd5#
- 2.Rd4#
- 1...Bf4
- 2.Rxf4#
- 1...Sxf2!
- threat
- 1.Bxg5?
- threat
- 2.Rf4#
- 1...Qa3+
- 2.Sc5#
- 1...Qg3+
- 2.Sf4#
- 1...fxg5
- 2.Re5#
- 1...Qd2
- 2.Sxd2#
- 1...Qe3
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 1...Qf3
- 2.Sd2#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Rf3!
- threat
- 1.Rxd3?
- threat
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Bf4+
- 2.Sxf4#
- 2.Rxf4#
- 1...Bxh6
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Bc1
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Bd2
- 2.Sxd2#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Be3
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 1...Bh4
- 2.Sd2#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 2.Rf4#
- 1...Rxd3!
- threat
- 1.Qa4?
- threat
- 2.Sd2#
- 1...Qa3+
- 2.Sxa3#
- 1...Qg3+
- 2.Se5#
- 1...Bf4+
- 2.Rxf4#
- 1...Qxe2
- 2.Sc5#
- 2.Bxd5#
- 2.Rd4#
- 1...Qxc4
- 2.Sc5#
- 2.Bxd5#
- 2.Qxc4#
- 1...Qd2
- 2.Sxd2#
- 1...Qd4
- 2.Rxd4#
- 1...Bd2
- 2.Sxd2#
- 1...Sxf2!
- threat
- 1.f3+?
- 1...Qxf3
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sxg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Bxd5#
- 2.Rd4#
- 1...Rxf3!
- 1...Qxf3
- 1.Kc7?
- Keys
- 1.Rxd5!
- threat
- 2.R5xd3#
- 2.Rd4#
- 1...Qa3+
- 2.Rc5#
- 1...Qg3+
- 2.Re5#
- 1...Qxd5+
- 2.Bxd5#
- 1...Bf4+
- 2.Sxf4#
- 1...Qxe2
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rxg5#
- 1...Qxc4
- 2.R5d4#
- 2.Re5#
- 1...Qxd1
- 2.Rxd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 1...Qb1
- 2.R1d4#
- 2.R5d4#
- 2.Rb5#
- 2.Re5#
- 1...Qc2
- 2.R1d4#
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rxg5#
- 1...Qd2
- 2.R5xd2#
- 2.Rd3#
- 2.Rd4#
- 1...Qb3
- 2.R1d4#
- 2.R5d4#
- 2.Rb5#
- 2.Re5#
- 1...Qc3
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rxg5#
- 1...Qe3
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rxg5#
- 1...Qf3
- 2.R1d4#
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Re5#
- 2.Rf5#
- 2.Rxg5#
- 1...Qd4
- 2.R1xd4#
- 2.R5xd4#
- threat
- 1.Rxd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 7
- Sets
- Q(b);CHECK::QAR(K)+S(H),DCHECK
- Q(b);CHECK::QAR(K)+S(H)
- R(c);N_GUARD::P(B),XQ(b)
- R(c);N_GUARD,XB(I)::P(B),XQ(b)
- B(f);S_CUTR(c)::P(B),XQ(b)
- B(f);CHECK,N_GUARD::R1(F),XB(f)
- B(f);N_GUARD::R1(F)
- S(a);S_CUTR(c)::P(B),XQ(b)
- Tries
- Try
- K(G);S_FLIGHT
- Threat
- S(D)
- Vars
- Q(b);CHECK,XS(D)::QAR(K)+S(H),DCHECK
- Q(b);CHECK::QAR(K)+S(H)
- B(f);CHECK,N_GUARD::R1(F),XB(f)
- Refutation
- S(a);XP(C)
- Try
- K(G);P-FLIGHT
- Threat
- S(D)
- Vars
- B(f);N_GUARD::R1(F),XB(f)
- Refutation
- S(a);XP(C)
- Try
- B(I);XB(f)
- Threat
- R1(F)
- Vars
- Q(b);CHECK::QAR(K)+S(H),DCHECK
- Q(b);CHECK::QAR(K)+S(H)
- P(g);N_GUARD,XB(I)::R1(F)
- Q(b);N_GUARD::S(D),XQ(b)
- Refutation
- R(c);
- Try
- R(A);XQ(b)
- Threat
- DUALS(10)
- Refutation
- R(c);XR(A)
- Try
- Q(K);
- Threat
- QAR(K)+S(D),DCHECK
- Vars
- Q(b);CHECK,N_GUARD::QAR(K)+S(D),XQ(b)
- Q(b);CHECK,N_GUARD::QAR(K)+S(D)
- B(f);CHECK,N_GUARD::R1(F),XB(f)
- Q(b);::QAR(K)+S(D),DCHECK,XQ(b)
- Q(b);OGATE::R1(A),XQ(b)
- B(f);::QAR(K)+S(D),DCHECK,XB(f)
- Refutation
- S(a);XP(C)
- Try
- P(C);CHECK
- Refutation
- R(c);XP(C)
- Try
- Actual
- R(F);P_SPINR(F),XP(e)
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,N_PINR(F)::B(J)+R(F)
- Q(b);CHECK,N_PINR(F)::B(J)+R(F),DCHECK
- Q(b);CHECK,OGATE,P_SPINQ(b),XR(F)::B(J),XQ(b)
- B(f);CHECK::QAR(K)+S(H),XB(f)
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).