MESON Chess Problem Database

Problem Display
PID: 239957 (n6q/2ppQ3/6B1/r5P1/p1RPNk2/Kp2ppR1/P6n/3r2bN w - - 0 1)

Hermanson, Halvar

Sinfonie Scacchistiche, 1975

n6q/2ppQ3/6B1/r5P1/p1RPNk2/Kp2ppR1/P6n/3r2bN

#2

10 + 13

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg5
      • 2.Qxg5#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qe4#
      • 1...Qxd4
        • 2.Rxd4#
      • 1...Qe5
        • 2.dxe5#
      • 1...Qe8
        • 2.d5#
      • 1...Qf8
        • 2.d5#
      • 1...Re5
        • 2.dxe5#
      • 1...Sg4
        • 2.Rxf3#
      • 1...d5!
    • 1.Sc5?
      • threat
        • 2.Qe4#
      • 1...Qxd4
        • 2.Qf6#
      • 1...Rxd4
        • 2.Sd3#
      • 1...d5
        • 2.Se6#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qe8
        • 2.Qf6#
      • 1...Sg4!
    • 1.Qf6+?
      • 1...Rf5
        • 2.Qxf5#
      • 1...Qxf6!
    • 1.Qf7+?
      • 1...Rf5
        • 2.Qxf5#
      • 1...Qf6!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qe4#
      • 1...Rxd4
        • 2.Rxd4#
      • 1...Sg4
        • 2.Rxg4#
      • 1...d5
        • 2.Qe5#
      • 1...Qe8
        • 2.Sh5#
      • 1...Qf8
        • 2.Sh5#
      • 1...Re5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(i);OGATE,XP(H)::QAB1(J),XR(i)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAR1(J)
      • Vars
        • Q(m);OGATE,P_SPINQ(m),XP(F)::R(E),XQ(m)
        • Q(m);OGATE::R(E)+P(F),XQ(m)
        • Q(m);N_GUARD::R(E)+P(F)
        • Q(m);N_GUARD,P_PINQ(J)::R(E)+P(F)
        • R(i);OGATE::R(E)+P(F),XR(i)
        • S(c);N_GUARD,SBLOCK::R1(D),XP(f)
      • Refutation
        • P(k);
    • Try
      • S(G);
      • Threat
        • QAR1(J)
      • Vars
        • Q(m);N_GUARD,P_SPINQ(m),XP(F)::QAR2(J)
        • R(a);N_GUARD,P_SPINR(a),XP(F)::S(G)
        • P(k);N_GUARD::S(G)
        • Q(m);N_GUARD::QAB1(J),XQ(m)
        • Q(m);N_GUARD::QAR2(J)
      • Refutation
        • S(c);
    • Try
      • Q(J);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAR1(J),XR(i)
      • Refutation
        • Q(m);XQ(J)
    • Try
      • Q(J);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAR1(J),XR(i)
      • Refutation
        • Q(m);P_SPINQ(m)
  • Actual
    • S(G);
    • Threat
      • QAR1(J)
    • Vars
      • R(a);OGATE,P_SPINR(a),XP(F)::R(E),XR(a)
      • S(c);N_GUARD::R1(D),XS(c)
      • P(k);S_CUTR(i)::QAB1(J)
      • Q(m);N_GUARD::S(G)
      • Q(m);N_GUARD,P_PINQ(J)::S(G)
      • R(i);N_GUARD::QAB1(J),XR(i)
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