MESON Chess Problem Database
Problem Display
PID: 196545 (3rb3/8/1N2B3/R2RBq1p/4k3/1K6/2N2pP1/7Q w - - 0 1)
Ruonala, Lauri Armas
Stella Polaris, 1972
#2
9 + 6
SOLUTION
- SOUND
- Sets
- 1...Qh3+
- 2.gxh3#
- 1...Qxe6
- 2.g4#
- 1...Qg6
- 2.g3#
- 2.g4#
- 1...Qh7
- 2.Qh4#
- 2.g3#
- 2.g4#
- 1...Qf3+
- 2.gxf3#
- 1...Qxe5
- 2.g3#
- 1...Qg5
- 2.g3#
- 2.g4#
- 1...Rd7
- 2.Ra4#
- 1...Ra8
- 2.Rd4#
- 1...Rb8
- 2.Rd4#
- 1...Rc8
- 2.Rd4#
- 1...Ba4+
- 2.Rxa4#
- 1...Bg6
- 2.Ra4#
- 1...Bd7
- 2.Rd4#
- 1...Bf7
- 2.Ra4#
- 1...Qh3+
- Tries
- 1.Sd7?
- threat
- 2.Sc5#
- 2.Ra4#
- 2.Rd4#
- 1...Qh3+
- 2.gxh3#
- 1...Qf3+
- 2.gxf3#
- 1...Qxe6
- 2.g4#
- 1...Qxe5
- 2.g3#
- 1...Rxd7
- 2.Ra4#
- 1...Bxd7
- 2.Rd4#
- 1...f1Q
- 2.Sc5#
- 2.Rd4#
- 1...f1B
- 2.Sc5#
- 2.Rd4#
- 1...Qf8
- 2.Rd4#
- 1...Ra8
- 2.Sc5#
- 2.Rd4#
- 1...Rc8
- 2.Rd4#
- 1...Rb8+!
- threat
- 1.Qd1?
- threat
- 2.Qe2#
- 2.Qd3#
- 2.Qd4#
- 1...Qf3+
- 2.Qxf3#
- 2.gxf3#
- 1...Ba4+
- 2.Rxa4#
- 1...Qxe6
- 2.Qf3#
- 2.Qd3#
- 1...Qxe5
- 2.Qf3#
- 1...Rxd5
- 2.Qe2#
- 2.Qxd5#
- 1...f1Q
- 2.Qd4#
- 1...f1S
- 2.Qd3#
- 2.Qd4#
- 1...f1B
- 2.Qd4#
- 1...Qg4
- 2.Qd3#
- 2.Qd4#
- 1...Qf4
- 2.Qd3#
- 2.Qd4#
- 1...Qg5
- 2.Qf3#
- 2.Qd3#
- 2.Qd4#
- 1...Bb5
- 2.Qd4#
- 1...Qh3+!
- threat
- 1.Qh3?
- threat
- 2.Bxf5#
- 2.Qxf5#
- 2.Qd3#
- 2.Qe3#
- 1...Qf3+
- 2.Qxf3#
- 2.gxf3#
- 1...Ba4+
- 2.Rxa4#
- 1...Qxe6
- 2.Qd3#
- 2.Qf3#
- 1...Qxe5
- 2.Qe3#
- 2.Qf3#
- 1...Rxd5
- 2.Qxf5#
- 2.Qe3#
- 1...f1Q
- 2.Qe3#
- 1...f1S
- 2.Bxf5#
- 2.Qxf5#
- 2.Qd3#
- 1...f1B
- 2.Bxf5#
- 2.Qxf5#
- 2.Qe3#
- 1...f1R
- 2.Qd3#
- 2.Qe3#
- 1...Qg4
- 2.Qd3#
- 2.Qe3#
- 1...Qg6
- 2.Qd3#
- 2.Qe3#
- 2.Qf3#
- 1...Qh7
- 2.Qd3#
- 2.Qe3#
- 2.Qf3#
- 2.Qh4#
- 1...Qf4
- 2.Qd3#
- 1...Qg5
- 2.Qd3#
- 2.Qf3#
- 1...Qf6
- 2.Qd3#
- 2.Qe3#
- 1...Qf7
- 2.Qd3#
- 2.Qe3#
- 1...Qf8
- 2.Qd3#
- 2.Qe3#
- 1...Bb5
- 2.Bxf5#
- 2.Qxf5#
- 2.Qe3#
- 1...Bg6
- 2.Ra4#
- 2.Qd3#
- 2.Qe3#
- 1...Bd7
- 2.Rd4#
- 2.Qxf5#
- 2.Qd3#
- 2.Qe3#
- 1...Qxh3+!
- threat
- 1.Qh4+?
- 1...Qf4
- 2.Qxf4#
- 1...Qg4!
- 1...Qf4
- 1.Sd7?
- Keys
- 1.Bd7!
- threat
- 2.Ra4#
- 2.Rd4#
- 1...Qh3+
- 2.gxh3#
- 1...Qf3+
- 2.gxf3#
- 1...Qxd7
- 2.g4#
- 1...Qxe5
- 2.g3#
- 1...Rxd7
- 2.Ra4#
- 1...Bxd7
- 2.Rd4#
- 1...Qe6
- 2.g4#
- 1...f1Q
- 2.Rd4#
- 1...f1B
- 2.Rd4#
- 1...Qf7
- 2.Ra4#
- 1...Qf8
- 2.Rd4#
- 1...Ra8
- 2.Rd4#
- 1...Rc8
- 2.Rd4#
- 1...Bf7
- 2.Ra4#
- threat
- 1.Bd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 3
- Sets
- Q(c);CHECK,OGATE::QAB(A)+P(C),XQ(c)
- Q(c);N_GUARD,P_PINR(F),XB(I)::QAB(A)+P(C)
- Q(c);CHECK,OGATE::P(C),XQ(c)
- Q(c);N_GUARD,XB(G)::QAB(A)+P(C)
- R(e);S_CUTB(f)::R(E)
- R(e);N_GUARD::R1(F)
- R(e);N_GUARD,P_PINS(H)::R1(F)
- B(f);CHECK,N_GUARD::R(E),XB(f)
- B(f);N_GUARD::R(E)
- B(f);S_CUTR(e)::R1(F)
- Tries
- Try
- S(H);
- Threat
- DUALS(3)
- Vars
- Q(c);CHECK,OGATE::QAB(A)+P(C),XQ(c)
- Q(c);CHECK,OGATE::P(C),XQ(c)
- Q(c);N_GUARD,P_PINR(F),XB(I)::QAB(A)+P(C)
- Q(c);N_GUARD,XB(G)::QAB(A)+P(C)
- R(e);XS(H)::R(E)
- B(f);XS(H)::R1(F)
- Q(c);::R1(F)
- R(e);::R1(F)
- Refutation
- R(e);CHECK
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- B(f);CHECK,N_GUARD::R(E),XB(f)
- Q(c);N_GUARD,XB(G)::QAB1(A)
- P(a);::QAR1(A)
- B(f);::QAR1(A)
- Refutation
- Q(c);CHECK
- Try
- Q(A);
- Threat
- DUALS(4)
- Vars
- B(f);CHECK,N_GUARD::R(E),XB(f)
- P(a);::QAR1(A)
- Q(c);::QAB1(A)
- Refutation
- Q(c);CHECK,XQ(A)
- Try
- Q(A);CHECK
- Vars
- Q(c);N_GUARD,P_SPINQ(c)::QAR1(A),XQ(c)
- Refutation
- Q(c);P_SPINQ(c)
- Try
- Actual
- B(I);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATE::QAB(A)+P(C),XQ(c)
- Q(c);CHECK,OGATE::P(C),XQ(c)
- Q(c);N_GUARD,XB(I)::QAB(A)+P(C)
- Q(c);N_GUARD,XB(G)::QAB(A)+P(C)
- R(e);XB(I)::R(E)
- B(f);XB(I)::R1(F)
- Q(c);N_GUARD,P_PINR(F)::QAB(A)+P(C)
- P(a);::R1(F)
- Q(c);P_PINR(F)::R(E)
- Q(c);::R1(F)
- R(e);::R1(F)
- B(f);P_PINR(F)::R(E)
Developed and maintained by Brian Stephenson.
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