MESON Chess Problem Database
Problem Display
PID: 271144 (4K3/3p1N2/R2Rp2p/1NQ1Bk1P/4p3/5PnP/7r/qB5b w - - 0 1)
Kozhakin, Vladimir Vladimirovich
Pat a Mat, 1992
#2
11 + 9
| 15601 | Albrecht-Leiss-Degener Collection | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Qd4
- 2.Sxd4#
- 1...Qxe5
- 2.Qxe5#
- 1...Qxb1
- 2.Sd4#
- 1...Qa2
- 2.Sd4#
- 1...Qa3
- 2.Sd4#
- 1...Qa5
- 2.Sd4#
- 1...Qxa6
- 2.Sd4#
- 1...Rb2
- 2.Sd4#
- 1...Sf1
- 2.Bxe4#
- 1...Se2
- 2.Bxe4#
- 1...Sxh5
- 2.Bxe4#
- 1...Qd4
- Tries
- 1.Bxa1+?
- 1...e5
- 2.Rf6#
- 2.Qxe5#
- 1...Kf4!
- 1...e5
- 1.Bb2+?
- 1...e5
- 2.Rf6#
- 2.Qxe5#
- 1...Kf4!
- 1...e5
- 1.Bc3+?
- 1...e5
- 2.Rf6#
- 2.Qxe5#
- 1...Kf4!
- 1...e5
- 1.Bxg3+?
- 1...Qe5
- 2.Qxe5#
- 1...e5
- 2.Bxe4#
- 2.Rf6#
- 1...Kf6!
- 1...Qe5
- 1.Bd4+?
- 1...e5
- 2.Rf6#
- 2.Qxe5#
- 1...Kf4!
- 1...e5
- 1.Bg7+?
- 1...Qe5
- 2.Qxe5#
- 1...e5
- 2.Rf6#
- 1...Kf4!
- 1...Qe5
- 1.Bh8+?
- 1...Qe5
- 2.Qxe5#
- 1...e5
- 2.Rf6#
- 1...Kf4!
- 1...Qe5
- 1.Rxa1?
- threat
- 2.Sd4#
- 1...Sxh5
- 2.Bxe4#
- 1...Se2
- 2.Bxe4#
- 1...Rd2!
- threat
- 1.Rd1?
- threat
- 2.Sbd6#
- 1...Qxe5
- 2.Qxe5#
- 1...Qxa6
- 2.Sd4#
- 1...Sxh5
- 2.Bxe4#
- 1...Qd4
- 2.Sxd4#
- 1...d6
- 2.Sbxd6#
- 1...Rd2!
- threat
- 1.Rd2?
- threat
- 2.Sbd6#
- 1...Qxe5
- 2.Qxe5#
- 1...Qxa6
- 2.Sd4#
- 1...Sxh5
- 2.Bxe4#
- 1...Qd4
- 2.Sxd4#
- 1...d6
- 2.Sbxd6#
- 1...Rxd2!
- threat
- 1.Rd3?
- threat
- 2.Sbd6#
- 1...Qxe5
- 2.Qxe5#
- 1...Qxa6
- 2.Sd4#
- 1...Qd4
- 2.Sxd4#
- 1...d6
- 2.Sbxd6#
- 1...Sxh5!
- threat
- 1.Rd4?
- threat
- 2.Sbd6#
- 1...Qxd4
- 2.Sxd4#
- 1...Sxh5
- 2.Bxe4#
- 1...d6
- 2.Sbxd6#
- 1...Qxa6!
- threat
- 1.Rd5?
- threat
- 2.Sbd6#
- 1...Qxa6
- 2.Sd4#
- 1...Sxh5
- 2.Bxe4#
- 1...exd5
- 2.Rf6#
- 1...d6
- 2.Sbxd6#
- 1...Qxe5!
- threat
- 1.Rdb6?
- threat
- 2.Sbd6#
- 1...Qxe5
- 2.Qxe5#
- 1...Sxh5
- 2.Bxe4#
- 1...Qd4
- 2.Sxd4#
- 1...d6
- 2.Sbxd6#
- 1...Rd2!
- threat
- 1.Rdc6?
- threat
- 2.Sbd6#
- 1...Qxe5
- 2.Qxe5#
- 1...Sxh5
- 2.Bxe4#
- 1...Qd4
- 2.Sxd4#
- 1...d6
- 2.Sbxd6#
- 1...Rd2!
- threat
- 1.Rxd7?
- threat
- 2.Sbd6#
- 1...Qxe5
- 2.Qxe5#
- 1...Qxa6
- 2.Sd4#
- 1...Sxh5
- 2.Bxe4#
- 1...Qd4
- 2.Sxd4#
- 1...Rd2!
- threat
- 1.Qe3?
- threat
- 2.Qf4#
- 1...Sxh5
- 2.Bxe4#
- 2.Qxe4#
- 1...Se2
- 2.Bxe4#
- 2.Qxe4#
- 1...Qxe5!
- threat
- 1.f4?
- threat
- 2.Sxh6#
- 1...Qxe5
- 2.Qxe5#
- 1...Sxh5!
- threat
- 1.h4?
- threat
- 2.Sxh6#
- 1...Qxe5
- 2.Qxe5#
- 1...Sxh5
- 2.Bxe4#
- 1...Rxh4!
- threat
- 1.Bxa1+?
- Keys
- 1.Rxe6!
- threat
- 2.Rf6#
- 1...Qxe5
- 2.Qxe5#
- 1...Qxa6
- 2.Sd4#
- 1...Sxh5
- 2.Bxe4#
- 1...dxe6
- 2.Sbd6#
- threat
- 1.Rxe6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- Q(a);N_GUARD::S(D),XQ(a)
- Q(a);OGATE,P_SPINQ(a),XB(F)::QAR1(E),XQ(a)
- Q(a);N_GUARD,N_SPINP(e),XB(A)::S(D)
- Q(a);N_GUARD::S(D)
- Q(a);N_GUARD,XR(H)::S(D)
- R(c);S_CUTQ(a)::S(D)
- S(d);N_GUARD::B(A),XP(e)
- S(d);N_GUARD,XP(G)::B(A),XP(e)
- Tries
- Try
- B(F);CHECK,XQ(a)
- Refutation
- K(f);N_SPINP(e),P-FLIGHT
- Try
- B(F);CHECK
- Refutation
- K(f);N_SPINP(e),P-FLIGHT
- Try
- B(F);CHECK
- Refutation
- K(f);N_SPINP(e),P-FLIGHT
- Try
- B(F);CHECK,XS(d)
- Vars
- Q(a);N_GUARD,P_SPINQ(a)::QAR1(E),XQ(a)
- Refutation
- K(f);N_SPINP(e),P-FLIGHT,P_SPINP(g)
- Try
- B(F);CHECK
- Refutation
- K(f);N_SPINP(e),P-FLIGHT
- Try
- B(F);CHECK
- Vars
- Q(a);N_GUARD,P_SPINQ(a)::QAR1(E),XQ(a)
- P(g);OGATE::R1(I)
- Refutation
- K(f);N_SPINP(e),P-FLIGHT
- Try
- B(F);CHECK
- Vars
- Q(a);N_GUARD,P_SPINQ(a)::QAR1(E),XQ(a)
- P(g);OGATE::R1(I)
- Refutation
- K(f);N_SPINP(e),P-FLIGHT
- Try
- R(H);XQ(a)
- Threat
- S(D)
- Vars
- S(d);N_GUARD,XP(G)::B(A),XP(e)
- S(d);N_GUARD::B(A),XP(e)
- Refutation
- R(c);
- Try
- R(I);
- Threat
- S(D)
- Vars
- Q(a);OGATE,P_SPINQ(a),XB(F)::QAR1(E),XQ(a)
- Q(a);N_GUARD,XR(H)::S(D)
- S(d);N_GUARD,XP(G)::B(A),XP(e)
- Q(a);N_GUARD::S(D),XQ(a)
- P(i);::S(D),XP(i)
- Refutation
- R(c);
- Try
- R(I);
- Threat
- S(D)
- Vars
- Q(a);OGATE,P_SPINQ(a),XB(F)::QAR1(E),XQ(a)
- Q(a);N_GUARD,XR(H)::S(D)
- S(d);N_GUARD,XP(G)::B(A),XP(e)
- Q(a);N_GUARD::S(D),XQ(a)
- P(i);::S(D),XP(i)
- Refutation
- R(c);XR(I)
- Try
- R(I);N_PINP(e)
- Threat
- S(D)
- Vars
- Q(a);OGATE,P_SPINQ(a),XB(F)::QAR1(E),XQ(a)
- Q(a);N_GUARD,XR(H)::S(D)
- Q(a);N_GUARD::S(D),XQ(a)
- P(i);::S(D),XP(i)
- Refutation
- S(d);XP(G)
- Try
- R(I);
- Threat
- S(D)
- Vars
- Q(a);XR(I)::S(D),XQ(a)
- S(d);N_GUARD,XP(G)::B(A),XP(e)
- P(i);::S(D),XP(i)
- Refutation
- Q(a);XR(H)
- Try
- R(I);
- Threat
- S(D)
- Vars
- Q(a);N_GUARD,XR(H)::S(D)
- S(d);N_GUARD,XP(G)::B(A),XP(e)
- P(g);OGATE,XR(I)::R1(H)
- P(i);::S(D),XP(i)
- Refutation
- Q(a);P_SPINQ(a),XB(F)
- Try
- R(I);
- Threat
- S(D)
- Vars
- Q(a);OGATE,P_SPINQ(a),XB(F)::QAR1(E),XQ(a)
- S(d);N_GUARD,XP(G)::B(A),XP(e)
- Q(a);N_GUARD::S(D),XQ(a)
- P(i);::S(D),XP(i)
- Refutation
- R(c);
- Try
- R(I);
- Threat
- S(D)
- Vars
- Q(a);OGATE,P_SPINQ(a),XB(F)::QAR1(E),XQ(a)
- S(d);N_GUARD,XP(G)::B(A),XP(e)
- Q(a);N_GUARD::S(D),XQ(a)
- P(i);::S(D),XP(i)
- Refutation
- R(c);
- Try
- R(I);XP(i)
- Threat
- S(D)
- Vars
- Q(a);OGATE,P_SPINQ(a),XB(F)::QAR1(E),XQ(a)
- Q(a);N_GUARD,XR(H)::S(D)
- S(d);N_GUARD,XP(G)::B(A),XP(e)
- Q(a);N_GUARD::S(D),XQ(a)
- Refutation
- R(c);
- Try
- Q(E);
- Threat
- QAR1(E)
- Refutation
- Q(a);XB(F)
- Try
- P(B);
- Threat
- S(J),XP(h)
- Vars
- Q(a);OGATE,P_SPINQ(a),XB(F)::QAR1(E),XQ(a)
- Refutation
- S(d);XP(G)
- Try
- P(C);
- Threat
- S(J),XP(h)
- Vars
- Q(a);OGATE,P_SPINQ(a),XB(F)::QAR1(E),XQ(a)
- S(d);N_GUARD,XP(G)::B(A),XP(e)
- Refutation
- R(c);XP(C)
- Try
- Actual
- R(I);XP(g)
- Threat
- R1(I)
- Vars
- Q(a);OGATE,P_PINR(I),P_SPINQ(a),XB(F)::QAR1(E),XQ(a)
- Q(a);N_GUARD,XR(H)::S(D)
- S(d);N_GUARD,XP(G)::B(A),XP(e)
- P(i);SBLOCK,XR(I)::S(D)
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).