MESON Chess Problem Database
Problem Display
PID: 239173 (4RB2/2p2nK1/2pr1R2/2PkpB2/2r1p1N1/4P3/Q7/8 w - - 0 1)
Hermanson, Halvar
Sachove umeni (Ceskoslovensky sach), 1962
#2
9 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Kxc5
- 2.Qa5#
- 1...Re6
- 2.Bxe6#
- 1...Rxf6
- 2.Sxf6#
- 1...Rd7
- 2.Be6#
- 1...Rd8
- 2.Be6#
- 1...Sg5
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...Sd8
- 2.Rxe5#
- 1...Sh8
- 2.Rxe5#
- 1...Kxc5
- Tries
- 1.Kg6?
- 1...Rxf6+
- 2.Sxf6#
- 1...Kxc5
- 2.Qa5#
- 1...Re6
- 2.Bxe6#
- 1...Rd7
- 2.Be6#
- 1...Rd8
- 2.Be6#
- 1...Sg5
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...Sd8
- 2.Rxe5#
- 1...Sh8+!
- 1...Rxf6+
- 1.Kxf7?
- threat
- 2.Rxe5#
- 1...Rxf6+
- 2.Sxf6#
- 1...Kxc5
- 2.Qa5#
- 1...Re6
- 2.Bxe6#
- 1...Rd7+!
- threat
- 1.Kh7?
- 1...Kxc5
- 2.Qa5#
- 1...Rxf6
- 2.Sxf6#
- 1...Re6
- 2.Bxe6#
- 1...Rd7
- 2.Be6#
- 1...Rd8
- 2.Be6#
- 1...Sh6
- 2.Rxe5#
- 1...Sd8
- 2.Rxe5#
- 1...Sh8
- 2.Rxe5#
- 1...Sg5+!
- 1...Kxc5
- 1.Kg8?
- 1...Kxc5
- 2.Qa5#
- 1...Rxf6
- 2.Sxf6#
- 1...Re6
- 2.Bxe6#
- 1...Rd7
- 2.Be6#
- 1...Rd8
- 2.Be6#
- 1...Sg5
- 2.Rxe5#
- 1...Sd8
- 2.Rxe5#
- 1...Sh8
- 2.Rxe5#
- 1...Sh6+!
- 1...Kxc5
- 1.Bxe4+?
- 1...Kxc5
- 2.Qa5#
- 1...Kxe4!
- 1...Kxc5
- 1.Be6+?
- 1...Kxc5
- 2.Qa5#
- 1...Rxe6!
- 1...Kxc5
- 1.Bd7?
- 1...Kxc5
- 2.Qa5#
- 1...Rxf6
- 2.Sxf6#
- 1...Sg5
- 2.Rxe5#
- 1...Re6
- 2.Bxe6#
- 1...Sh6
- 2.Rxe5#
- 1...Sd8
- 2.Rxe5#
- 1...Sh8
- 2.Rxe5#
- 1...Rxd7!
- 1...Kxc5
- 1.Bc8?
- 1...Kxc5
- 2.Qa5#
- 1...Rxf6
- 2.Sxf6#
- 1...Re6
- 2.Bxe6#
- 1...Rd8
- 2.Be6#
- 1...Sg5
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...Sd8
- 2.Rxe5#
- 1...Sh8
- 2.Rxe5#
- 1...Rd7!
- 1...Kxc5
- 1.Bxd6?
- threat
- 2.Be6#
- 1...Sxd6
- 2.Rxe5#
- 1...Sg5
- 2.Rxe5#
- 1...Sd8
- 2.Rxe5#
- 1...cxd6!
- threat
- 1.Rxd6+?
- 1...Kxc5
- 2.Qa5#
- 1...Sxd6
- 2.Rxe5#
- 1...cxd6!
- 1...Kxc5
- 1.Rg6?
- 1...Kxc5
- 2.Qa5#
- 1...Sg5
- 2.Rxe5#
- 1...Re6
- 2.Bxe6#
- 1...Rf6
- 2.Sxf6#
- 1...Rd7
- 2.Sf6#
- 2.Be6#
- 1...Rd8
- 2.Sf6#
- 2.Be6#
- 1...Sh6
- 2.Rxe5#
- 1...Sd8
- 2.Rxe5#
- 1...Sh8
- 2.Rxe5#
- 1...Rxg6+!
- 1...Kxc5
- 1.Rxf7?
- threat
- 2.Rxe5#
- 1...Kxc5
- 2.Qa5#
- 1...Re6
- 2.Bxe6#
- 1...Rg6+!
- threat
- 1.Qb3?
- 1...Rxf6
- 2.Sxf6#
- 1...Sg5
- 2.Rxe5#
- 1...Re6
- 2.Bxe6#
- 1...Rd7
- 2.Be6#
- 1...Rd8
- 2.Be6#
- 1...Sh6
- 2.Rxe5#
- 1...Sd8
- 2.Rxe5#
- 1...Sh8
- 2.Rxe5#
- 1...Kxc5!
- 1...Rxf6
- 1.Qd2+?
- 1...Kxc5
- 2.Qa5#
- 1...Rd4!
- 1...Kxc5
- 1.Kg6?
- Keys
- 1.Rfe6!
- 1...Kxc5
- 2.Qa5#
- 1...Rxe6
- 2.Bxe6#
- 1...Sg5
- 2.Rxe5#
- 1...Rd7
- 2.Sf6#
- 1...Rd8
- 2.Sf6#
- 1...Sh6
- 2.Rxe5#
- 1...Sd8
- 2.Rxe5#
- 1...Sh8
- 2.Rxe5#
- 1...Kxc5
- 1.Rfe6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- K(c);N_SPINR(a),OGATEB,P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- R(f);N_GUARD::B(E),XR(f)
- R(f);XR(F)::S(C),XR(f)
- R(f);N_GUARD::B(E)
- S(h);N_GUARD::R1(H),XP(d)
- Tries
- Try
- K(G);P-FLIGHT,P_SPINR(F)
- Vars
- R(f);CHECK,XR(F)::S(C),XR(f)
- K(c);N_SPINR(a),OGATEB,P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- R(f);N_GUARD::B(E),XR(f)
- R(f);N_GUARD,N_PINR(F)::B(E)
- S(h);N_GUARD::R1(H),XP(d)
- Refutation
- S(h);CHECK
- Try
- K(G);P-FLIGHT,XS(h)
- Threat
- R1(H),XP(d)
- Vars
- R(f);CHECK,XR(F)::S(C),XR(f)
- K(c);N_SPINR(a),OGATEB,P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- R(f);N_GUARD::B(E),XR(f)
- Refutation
- R(f);CHECK
- Try
- K(G);P-FLIGHT
- Vars
- K(c);N_SPINR(a),OGATEB,P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- R(f);XR(F)::S(C),XR(f)
- R(f);N_GUARD::B(E),XR(f)
- R(f);N_GUARD::B(E)
- S(h);N_GUARD::R1(H),XP(d)
- Refutation
- S(h);CHECK
- Try
- K(G);P-FLIGHT
- Vars
- K(c);N_SPINR(a),OGATEB,P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- R(f);XR(F)::S(C),XR(f)
- R(f);N_GUARD::B(E),XR(f)
- R(f);N_GUARD::B(E)
- S(h);N_GUARD::R1(H),XP(d)
- Refutation
- S(h);CHECK
- Try
- B(E);CHECK,XP(b)
- Vars
- K(c);N_SPINR(a),P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- Refutation
- K(c);N_SPINR(a),P_SPINP(d),S_FLIGHT,XB(E)
- Try
- B(E);CHECK
- Vars
- K(c);N_SPINR(a),P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- Refutation
- R(f);XB(E)
- Try
- B(E);
- Vars
- K(c);N_SPINR(a),OGATEB,P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- R(f);XR(F)::S(C),XR(f)
- S(h);N_GUARD::R1(H),XP(d)
- R(f);N_GUARD::B(E),XR(f)
- Refutation
- R(f);XB(E)
- Try
- B(E);
- Vars
- K(c);N_SPINR(a),OGATEB,P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- R(f);XR(F)::S(C),XR(f)
- R(f);N_GUARD::B(E),XR(f)
- R(f);N_GUARD::B(E)
- S(h);N_GUARD::R1(H),XP(d)
- Refutation
- R(f);
- Try
- B(I);XR(f)
- Threat
- B(E)
- Vars
- S(h);N_GUARD,XB(I)::R1(H),XP(d)
- S(h);N_GUARD::R1(H),XP(d)
- Refutation
- P(g);XB(I)
- Try
- R(F);CHECK,XR(f)
- Vars
- K(c);N_SPINR(a),P-FLIGHT,XP(D)::QAR2(A)
- S(h);XR(F)::R1(H),XP(d)
- Refutation
- P(g);XR(F)
- Try
- R(F);
- Vars
- K(c);N_SPINR(a),OGATEB,P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- S(h);N_GUARD::R1(H),XP(d)
- R(f);N_GUARD::B(E),XR(f)
- R(f);N_GUARD::S(C),XR(f)
- Refutation
- R(f);CHECK,XR(F)
- Try
- R(F);XS(h)
- Threat
- R1(H),XP(d)
- Vars
- K(c);N_SPINR(a),OGATEB,P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- R(f);N_GUARD::B(E),XR(f)
- Refutation
- R(f);CHECK
- Try
- Q(A);
- Vars
- R(f);XR(F)::S(C),XR(f)
- S(h);N_GUARD::R1(H),XP(d)
- R(f);N_GUARD::B(E),XR(f)
- R(f);N_GUARD::B(E)
- Refutation
- K(c);N_SPINR(a),P-FLIGHT,P_SPINR(f),XP(D)
- Try
- Q(A);CHECK,N_PINR(a)
- Vars
- K(c);OGATEB,P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- Refutation
- R(a);P_SPINR(a)
- Try
- Actual
- R(F);
- Vars
- K(c);N_SPINR(a),OGATEB,P-FLIGHT,P_SPINR(f),XP(D)::QAR2(A)
- R(f);OGATE,XR(F)::B(E),XR(f)
- S(h);N_GUARD::R1(F),XP(d)
- R(f);::S(C)
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).