MESON Chess Problem Database
Problem Display
PID: 18895 (n3N1K1/1Q6/7p/r1kp2bR/1R1p4/8/4nB2/8 w - - 0 1)
Gruber, Bratoljub
3rd HM., Chigorin MT, 1959-1960
#2
6 + 8
| 273 | Mat Plus | 1995 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qb5#
- 1...Ra2
- 2.Qb5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Rb5
- 2.Qxb5#
- 1...Ra6
- 2.Qb5#
- 1...Ra7
- 2.Qb5#
- 1...Bc1
- 2.Rxd5#
- 1...Bd2
- 2.Rxd5#
- 1...Be3
- 2.Rxd5#
- 1...Bf4
- 2.Rxd5#
- 1...Bh4
- 2.Rxd5#
- 1...Bf6
- 2.Rxd5#
- 1...Be7
- 2.Rxd5#
- 1...Bd8
- 2.Rxd5#
- 1...Sc1
- 2.Bxd4#
- 1...Sg1
- 2.Bxd4#
- 1...Sc3
- 2.Bxd4#
- 1...Sg3
- 2.Bxd4#
- 1...Sf4
- 2.Bxd4#
- 1...Sb6
- 2.Qxb6#
- 1...Sc7
- 2.Qb6#
- 1...Ra1
- Tries
- 1.Kf7?
- 1...Rb5
- 2.Qxb5#
- 1...Sb6
- 2.Qxb6#
- 1...Ra1
- 2.Qb5#
- 1...Ra2
- 2.Qb5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Ra6
- 2.Qb5#
- 1...Bc1
- 2.Rxd5#
- 1...Bd2
- 2.Rxd5#
- 1...Be3
- 2.Rxd5#
- 1...Bf4
- 2.Rxd5#
- 1...Bh4
- 2.Rxd5#
- 1...Bf6
- 2.Rxd5#
- 1...Be7
- 2.Rxd5#
- 1...Bd8
- 2.Rxd5#
- 1...Sc1
- 2.Bxd4#
- 1...Sg1
- 2.Bxd4#
- 1...Sc3
- 2.Bxd4#
- 1...Sg3
- 2.Bxd4#
- 1...Sf4
- 2.Bxd4#
- 1...Sc7
- 2.Qb6#
- 1...Ra7!
- 1...Rb5
- 1.Kh7?
- 1...Rb5
- 2.Qxb5#
- 1...Sb6
- 2.Qxb6#
- 1...Ra1
- 2.Qb5#
- 1...Ra2
- 2.Qb5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Ra6
- 2.Qb5#
- 1...Bc1
- 2.Rxd5#
- 1...Bd2
- 2.Rxd5#
- 1...Be3
- 2.Rxd5#
- 1...Bf4
- 2.Rxd5#
- 1...Bh4
- 2.Rxd5#
- 1...Bf6
- 2.Rxd5#
- 1...Be7
- 2.Rxd5#
- 1...Bd8
- 2.Rxd5#
- 1...Sc1
- 2.Bxd4#
- 1...Sg1
- 2.Bxd4#
- 1...Sc3
- 2.Bxd4#
- 1...Sg3
- 2.Bxd4#
- 1...Sf4
- 2.Bxd4#
- 1...Sc7
- 2.Qb6#
- 1...Ra7!
- 1...Rb5
- 1.Kf8?
- 1...Rb5
- 2.Qxb5#
- 1...Sb6
- 2.Qxb6#
- 1...Ra7
- 2.Qb5#
- 1...Ra1
- 2.Qb5#
- 1...Ra2
- 2.Qb5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Ra6
- 2.Qb5#
- 1...Bc1
- 2.Rxd5#
- 1...Bd2
- 2.Rxd5#
- 1...Be3
- 2.Rxd5#
- 1...Bf4
- 2.Rxd5#
- 1...Bh4
- 2.Rxd5#
- 1...Bf6
- 2.Rxd5#
- 1...Bd8
- 2.Rxd5#
- 1...Sc1
- 2.Bxd4#
- 1...Sg1
- 2.Bxd4#
- 1...Sc3
- 2.Bxd4#
- 1...Sg3
- 2.Bxd4#
- 1...Sf4
- 2.Bxd4#
- 1...Sc7
- 2.Qb6#
- 1...Be7+!
- 1...Rb5
- 1.Kh8?
- 1...Rb5
- 2.Qxb5#
- 1...Sb6
- 2.Qxb6#
- 1...Ra7
- 2.Qb5#
- 1...Ra1
- 2.Qb5#
- 1...Ra2
- 2.Qb5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Ra6
- 2.Qb5#
- 1...Bc1
- 2.Rxd5#
- 1...Bd2
- 2.Rxd5#
- 1...Be3
- 2.Rxd5#
- 1...Bf4
- 2.Rxd5#
- 1...Bh4
- 2.Rxd5#
- 1...Be7
- 2.Rxd5#
- 1...Bd8
- 2.Rxd5#
- 1...Sc1
- 2.Bxd4#
- 1...Sg1
- 2.Bxd4#
- 1...Sc3
- 2.Bxd4#
- 1...Sg3
- 2.Bxd4#
- 1...Sf4
- 2.Bxd4#
- 1...Sc7
- 2.Qb6#
- 1...Bf6+!
- 1...Rb5
- 1.Bg1?
- 1...Rb5
- 2.Qxb5#
- 1...Sb6
- 2.Qxb6#
- 1...Ra7
- 2.Qb5#
- 1...Ra1
- 2.Qb5#
- 1...Ra2
- 2.Qb5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Ra6
- 2.Qb5#
- 1...Bc1
- 2.Rxd5#
- 1...Bd2
- 2.Rxd5#
- 1...Be3
- 2.Rxd5#
- 1...Bf4
- 2.Rxd5#
- 1...Bh4
- 2.Rxd5#
- 1...Bf6
- 2.Rxd5#
- 1...Be7
- 2.Rxd5#
- 1...Bd8
- 2.Rxd5#
- 1...Sc1
- 2.Bxd4#
- 1...Sc3
- 2.Bxd4#
- 1...Sg3
- 2.Bxd4#
- 1...Sf4
- 2.Bxd4#
- 1...Sc7
- 2.Qb6#
- 1...Sxg1!
- 1...Rb5
- 1.Be3?
- 1...Bxe3
- 2.Rxd5#
- 1...Rb5
- 2.Qxb5#
- 1...Sb6
- 2.Qxb6#
- 1...Ra7
- 2.Qb5#
- 1...Ra1
- 2.Qb5#
- 1...Ra2
- 2.Qb5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Ra6
- 2.Qb5#
- 1...Bf4
- 2.Rxd5#
- 1...Bh4
- 2.Rxd5#
- 1...Bf6
- 2.Rxd5#
- 1...Be7
- 2.Rxd5#
- 1...Bd8
- 2.Rxd5#
- 1...Sc1
- 2.Bxd4#
- 1...Sg1
- 2.Bxd4#
- 1...Sc3
- 2.Bxd4#
- 1...Sg3
- 2.Bxd4#
- 1...Sf4
- 2.Bxd4#
- 1...Sc7
- 2.Qb6#
- 1...dxe3!
- 1...Bxe3
- 1.Rxg5?
- threat
- 2.Rxd5#
- 1...Rb5
- 2.Qxb5#
- 1...Sb6
- 2.Qxb6#
- 1...Sc3
- 2.Bxd4#
- 1...Sf4
- 2.Bxd4#
- 1...Sc7
- 2.Qb6#
- 1...hxg5!
- threat
- 1.Qe7+?
- 1...Kc6
- 2.Qd6#
- 1...Bxe7!
- 1...Kc6
- 1.Kf7?
- Keys
- 1.Rb3!
- 1...Kc4
- 2.Qb4#
- 1...Ra7
- 2.Qb5#
- 1...Ra1
- 2.Qb5#
- 1...Ra2
- 2.Qb5#
- 1...Ra3
- 2.Qb5#
- 1...Ra4
- 2.Qb5#
- 1...Rb5
- 2.Qxb5#
- 1...Ra6
- 2.Qb5#
- 1...Bc1
- 2.Qxd5#
- 1...Bd2
- 2.Qxd5#
- 1...Be3
- 2.Qxd5#
- 1...Bf4
- 2.Qxd5#
- 1...Bh4
- 2.Qxd5#
- 1...Bf6
- 2.Qxd5#
- 1...Be7
- 2.Qxd5#
- 1...Bd8
- 2.Qxd5#
- 1...Sc1
- 2.Rc3#
- 1...Sg1
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sg3
- 2.Rc3#
- 1...Sf4
- 2.Rc3#
- 1...Sb6
- 2.Qc7#
- 1...Sc7
- 2.Qxc7#
- 1...Kc4
- 1.Rb3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 15
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD::QAR1(D)
- R(c);N_GUARD::QAR1(D),XR(c)
- B(f);OGATE::R1(C),XP(e)
- B(f);N_SPINP(b),OGATE,P_SPINP(e)::R1(C),XP(e)
- S(a);N_GUARD::B(A),XP(b)
- S(h);N_GUARD::QAB1(D),XS(h)
- S(h);N_GUARD::QAB1(D)
- Tries
- Try
- K(F);S_FLIGHT
- Vars
- R(c);N_GUARD::QAR1(D),XR(c)
- S(h);N_GUARD::QAB1(D),XS(h)
- R(c);N_GUARD::QAR1(D)
- B(f);OGATE::R1(C),XP(e)
- B(f);N_SPINP(b),OGATE,P_SPINP(e)::R1(C),XP(e)
- S(a);N_GUARD::B(A),XP(b)
- S(h);N_GUARD::QAB1(D)
- Refutation
- R(c);P_PINQ(D)
- Try
- K(F);S_FLIGHT
- Vars
- R(c);N_GUARD::QAR1(D),XR(c)
- S(h);N_GUARD::QAB1(D),XS(h)
- R(c);N_GUARD::QAR1(D)
- B(f);OGATE::R1(C),XP(e)
- B(f);N_SPINP(b),OGATE,P_SPINP(e)::R1(C),XP(e)
- S(a);N_GUARD::B(A),XP(b)
- S(h);N_GUARD::QAB1(D)
- Refutation
- R(c);P_PINQ(D)
- Try
- K(F);P-FLIGHT
- Vars
- R(c);N_GUARD::QAR1(D),XR(c)
- S(h);N_GUARD::QAB1(D),XS(h)
- R(c);N_GUARD::QAR1(D)
- B(f);OGATE::R1(C),XP(e)
- B(f);N_SPINP(b),OGATE,P_SPINP(e)::R1(C),XP(e)
- S(a);N_GUARD::B(A),XP(b)
- S(h);N_GUARD::QAB1(D)
- Refutation
- B(f);CHECK
- Try
- K(F);P-FLIGHT
- Vars
- R(c);N_GUARD::QAR1(D),XR(c)
- S(h);N_GUARD::QAB1(D),XS(h)
- R(c);N_GUARD::QAR1(D)
- B(f);OGATE::R1(C),XP(e)
- B(f);N_SPINP(b),OGATE,P_SPINP(e)::R1(C),XP(e)
- S(a);N_GUARD::B(A),XP(b)
- S(h);N_GUARD::QAB1(D)
- Refutation
- B(f);CHECK
- Try
- B(A);
- Vars
- R(c);N_GUARD::QAR1(D),XR(c)
- S(h);N_GUARD::QAB1(D),XS(h)
- R(c);N_GUARD::QAR1(D)
- B(f);OGATE::R1(C),XP(e)
- B(f);N_SPINP(b),OGATE,P_SPINP(e)::R1(C),XP(e)
- S(a);N_GUARD::B(A),XP(b)
- S(h);N_GUARD::QAB1(D)
- Refutation
- S(a);N_SPINP(b),XB(A)
- Try
- B(A);
- Vars
- B(f);N_SPINP(b),OGATE,P_SPINP(e),XB(A)::R1(C),XP(e)
- R(c);N_GUARD::QAR1(D),XR(c)
- S(h);N_GUARD::QAB1(D),XS(h)
- R(c);N_GUARD::QAR1(D)
- B(f);OGATE::R1(C),XP(e)
- S(a);N_GUARD::B(A),XP(b)
- S(h);N_GUARD::QAB1(D)
- Refutation
- P(b);N_SPINP(b),XB(A)
- Try
- R(C);XB(f)
- Threat
- R1(C),XP(e)
- Vars
- R(c);N_GUARD::QAR1(D),XR(c)
- S(h);N_GUARD::QAB1(D),XS(h)
- S(a);N_GUARD::B(A),XP(b)
- S(h);N_GUARD::QAB1(D)
- Refutation
- P(g);XR(C)
- Try
- Q(D);CHECK
- Vars
- K(d);N_SPINP(b),P-FLIGHT::QAR1(D)
- Refutation
- B(f);XQ(D)
- Try
- Actual
- R(B);
- Vars
- K(d);N_SPINP(b),P-FLIGHT::QAR1(D)
- R(c);N_GUARD::QAR1(D)
- R(c);N_GUARD::QAR1(D),XR(c)
- B(f);::QAR1(D),XP(e)
- B(f);N_SPINP(b),P_SPINP(e)::QAR1(D),XP(e)
- S(a);N_GUARD::R(B)
- S(a);N_GUARD::R(B),XS(a)
- S(h);N_GUARD::QAR2(D)
- S(h);N_GUARD::QAR2(D),XS(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).