MESON Chess Problem Database

Problem Display
PID: 222546 (2rb4/3R4/Q2r3p/2NB1p2/3k1P2/2NPn2q/1P3P2/n1K1R3 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Suomen Shakki, 1958

2rb4/3R4/Q2r3p/2NB1p2/3k1P2/2NPn2q/1P3P2/n1K1R3

#2

11 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Se6#
    • 1...Re6
      • 2.Sxe6#
    • 1...Rxd7
      • 2.Se6#
    • 1...Sac2
      • 2.Sb3#
    • 1...Sb3+
      • 2.Sxb3#
    • 1...Sd1
      • 2.Qc4#
    • 1...Sf1
      • 2.Qc4#
    • 1...Sec2
      • 2.Qc4#
    • 1...Sg2
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sg4
      • 2.Qc4#
    • 1...Sxd5
      • 2.Qc4#
  • Tries
    • 1.Se2+?
      • 1...Kxd5
        • 2.Qxd6#
      • 1...Kxc5!
    • 1.Sb5+?
      • 1...Kxd5
        • 2.Qxd6#
      • 1...Kxc5!
    • 1.Bh1?
      • threat
        • 2.Se6#
      • 1...Sb3+
        • 2.Sxb3#
      • 1...Kxc5
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Rxc5!
    • 1.Ba2?
      • threat
        • 2.Se6#
      • 1...Sb3+
        • 2.Sxb3#
      • 1...Kxc5
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Rxc5!
    • 1.Bg2?
      • threat
        • 2.Se6#
      • 1...Sb3+
        • 2.Sxb3#
      • 1...Kxc5
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Rxc5!
    • 1.Bb3?
      • threat
        • 2.Se6#
      • 1...Sxb3+
        • 2.Sxb3#
      • 1...Kxc5
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Rxc5!
    • 1.Bc4?
      • threat
        • 2.Se6#
      • 1...Sb3+
        • 2.Sxb3#
      • 1...Kxc5
        • 2.Qxd6#
      • 1...Rxc5
        • 2.Se2#
      • 1...Sxc4
        • 2.Qxc4#
      • 1...Sd5!
    • 1.Bc6?
      • threat
        • 2.Se6#
      • 1...Sb3+
        • 2.Sxb3#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Kxc5!
    • 1.Bb7?
      • threat
        • 2.Se6#
      • 1...Sb3+
        • 2.Sxb3#
      • 1...Kxc5
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Rxc5!
    • 1.Bf7?
      • threat
        • 2.Se6#
      • 1...Sb3+
        • 2.Sxb3#
      • 1...Kxc5
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Rxc5!
    • 1.Ba8?
      • threat
        • 2.Se6#
      • 1...Sb3+
        • 2.Sxb3#
      • 1...Kxc5
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Rxc5!
    • 1.Bg8?
      • threat
        • 2.Se6#
      • 1...Sb3+
        • 2.Sxb3#
      • 1...Kxc5
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Rxc5!
    • 1.Qa4+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kxc5!
    • 1.fxe3+?
      • 1...Kxc5
        • 2.Qb5#
        • 2.Qxd6#
      • 1...Qxe3+!
  • Keys
    • 1.Bf3!
      • threat
        • 2.Se6#
      • 1...Sb3+
        • 2.Sxb3#
      • 1...Kxc5
        • 2.Qxd6#
      • 1...Rxc5
        • 2.fxe3#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(f);N_GUARD,P_SPINR(f),XB(I)::S(H)
    • R(f);N_GUARD::S(H),XR(f)
    • R(f);N_GUARD,XR(K)::S(H)
    • S(a);N_GUARD::S(H)
    • S(a);CHECK,N_GUARD::S(H),XS(a)
    • S(b);N_GUARD::QAR1(J)
    • S(b);N_GUARD::QAR1(J),XS(b)
    • S(b);N_GUARD,XB(I)::QAR1(J)
  • Tries
    • Try
      • S(E);CHECK,P_SPINS(H)
      • Vars
        • K(d);P-FLIGHT,P_SPINR(f),XB(I)::QAR1(J),XR(f)
      • Refutation
        • K(d);S_FLIGHT,XS(H)
    • Try
      • S(E);CHECK,P_SPINS(H)
      • Vars
        • K(d);P-FLIGHT,P_SPINR(f),XB(I)::QAR1(J),XR(f)
      • Refutation
        • K(d);S_FLIGHT,XS(H)
    • Try
      • B(I);P_PINR(f)
      • Threat
        • S(H)
      • Vars
        • S(a);CHECK,N_GUARD::S(H),XS(a)
        • K(d);N_SPINR(f),S_FLIGHT,XS(H)::QAB1(J),XR(f)
        • S(b);N_GUARD::QAR1(J),XS(b)
        • S(b);N_GUARD,N_SPINR(f)::QAR1(J)
      • Refutation
        • R(h);P_PINS(E),XS(H)
    • Try
      • B(I);P_PINR(f)
      • Threat
        • S(H)
      • Vars
        • S(a);CHECK,N_GUARD::S(H),XS(a)
        • K(d);N_SPINR(f),S_FLIGHT,XS(H)::QAB1(J),XR(f)
        • S(b);N_GUARD::QAR1(J),XS(b)
        • S(b);N_GUARD,N_SPINR(f)::QAR1(J)
      • Refutation
        • R(h);P_PINS(E),XS(H)
    • Try
      • B(I);P_PINR(f)
      • Threat
        • S(H)
      • Vars
        • S(a);CHECK,N_GUARD::S(H),XS(a)
        • K(d);N_SPINR(f),S_FLIGHT,XS(H)::QAB1(J),XR(f)
        • S(b);N_GUARD::QAR1(J),XS(b)
        • S(b);N_GUARD,N_SPINR(f)::QAR1(J)
      • Refutation
        • R(h);P_PINS(E),XS(H)
    • Try
      • B(I);P_PINR(f)
      • Threat
        • S(H)
      • Vars
        • S(a);CHECK,XB(I)::S(H),XS(a)
        • K(d);N_SPINR(f),S_FLIGHT,XS(H)::QAB1(J),XR(f)
        • S(b);N_GUARD::QAR1(J),XS(b)
        • S(b);N_GUARD,N_SPINR(f)::QAR1(J)
      • Refutation
        • R(h);P_PINS(E),XS(H)
    • Try
      • B(I);P_PINR(f)
      • Threat
        • S(H)
      • Vars
        • S(a);CHECK,N_GUARD::S(H),XS(a)
        • K(d);N_SPINR(f),S_FLIGHT,XS(H)::QAB1(J),XR(f)
        • R(h);SBLOCK,XS(H)::S(E)
        • S(b);OGATE,XB(I)::QAR1(J),XS(b)
      • Refutation
        • S(b);N_SPINR(f)
    • Try
      • B(I);P_PINR(f)
      • Threat
        • S(H)
      • Vars
        • S(a);CHECK,N_GUARD::S(H),XS(a)
        • S(b);N_GUARD::QAR1(J),XS(b)
        • S(b);N_GUARD,N_SPINR(f)::QAR1(J)
      • Refutation
        • K(d);N_SPINR(f),S_FLIGHT,XS(H)
    • Try
      • B(I);P_PINR(f)
      • Threat
        • S(H)
      • Vars
        • S(a);CHECK,N_GUARD::S(H),XS(a)
        • K(d);N_SPINR(f),S_FLIGHT,XS(H)::QAB1(J),XR(f)
        • S(b);N_GUARD::QAR1(J),XS(b)
        • S(b);N_GUARD,N_SPINR(f)::QAR1(J)
      • Refutation
        • R(h);P_PINS(E),XS(H)
    • Try
      • B(I);P_PINR(f)
      • Threat
        • S(H)
      • Vars
        • S(a);CHECK,N_GUARD::S(H),XS(a)
        • K(d);N_SPINR(f),S_FLIGHT,XS(H)::QAB1(J),XR(f)
        • S(b);N_GUARD::QAR1(J),XS(b)
        • S(b);N_GUARD,N_SPINR(f)::QAR1(J)
      • Refutation
        • R(h);P_PINS(E),XS(H)
    • Try
      • B(I);P_PINR(f)
      • Threat
        • S(H)
      • Vars
        • S(a);CHECK,N_GUARD::S(H),XS(a)
        • K(d);N_SPINR(f),S_FLIGHT,XS(H)::QAB1(J),XR(f)
        • S(b);N_GUARD::QAR1(J),XS(b)
        • S(b);N_GUARD,N_SPINR(f)::QAR1(J)
      • Refutation
        • R(h);P_PINS(E),XS(H)
    • Try
      • B(I);P_PINR(f)
      • Threat
        • S(H)
      • Vars
        • S(a);CHECK,N_GUARD::S(H),XS(a)
        • K(d);N_SPINR(f),S_FLIGHT,XS(H)::QAB1(J),XR(f)
        • S(b);N_GUARD::QAR1(J),XS(b)
        • S(b);N_GUARD,N_SPINR(f)::QAR1(J)
      • Refutation
        • R(h);P_PINS(E),XS(H)
    • Try
      • Q(J);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(J),XS(b)
      • Refutation
        • K(d);S_FLIGHT,XS(H)
    • Try
      • P(D);CHECK,XS(b)
      • Refutation
        • Q(c);CHECK,XP(D)
  • Actual
    • B(I);P_PINR(f)
    • Threat
      • S(H)
    • Vars
      • S(a);CHECK,N_GUARD::S(H),XS(a)
      • K(d);N_SPINR(f),S_FLIGHT,XS(H)::QAB1(J),XR(f)
      • R(h);P_PINS(E),SBLOCK,XS(H)::P(D),XS(b)
      • S(b);N_GUARD::QAR1(J),XS(b)
      • S(b);N_GUARD,N_SPINR(f)::QAR1(J)
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