MESON Chess Problem Database

Problem Display
PID: 238081 (5R2/b7/1p2K3/4Q3/B2BN3/3PrPP1/n3k3/3R4 w - - 0 1)

Hermanson, Halvar

Norsk Sjakkblad, 1952

5R2/b7/1p2K3/4Q3/B2BN3/3PrPP1/n3k3/3R4

#2

10 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd3
      • 2.Sc3#
    • 1...Rxf3
      • 2.Sc3#
    • 1...Rxe4
      • 2.Qxe4#
  • Tries
    • 1.Sc3+?
      • 1...Sxc3
        • 2.Qxe3#
      • 1...Kf2!
    • 1.Qf4?
      • threat
        • 2.Qxe3#
      • 1...Rxe4+
        • 2.Qxe4#
      • 1...Rxf3
        • 2.Qd2#
        • 2.Qxf3#
      • 1...Rxd3!
    • 1.Qb5?
      • threat
        • 2.Qb2#
      • 1...Rxe4+
        • 2.dxe4#
      • 1...Rxd3
        • 2.Qxd3#
      • 1...Sb4!
    • 1.g4?
      • threat
        • 2.Qh2#
      • 1...Rxf3
        • 2.Sc3#
        • 2.Sg3#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Bb8!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qh2#
      • 1...Rxe4+
        • 2.fxe4#
      • 1...Rxf3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(c);XP(B)::QAR(H)+S(G),DCHECK
    • R(c);XP(C)::QAR(H)+S(G),DCHECK
    • R(c);OGATE,P_PINQ(H),P_SPINR(c),XS(G)::QAR2(H),XR(c)
  • Tries
    • Try
      • S(G);CHECK,P_PINR(c),P_SPINQ(H)
      • Vars
        • S(a);XS(G)::QAR1(H),XR(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(H);P_SPINS(G)
      • Threat
        • QAR1(H),XR(c)
      • Vars
        • R(c);CHECK,OGATE,XS(G)::QAR2(H),XR(c)
      • Refutation
        • R(c);N_PINS(G),XP(B)
    • Try
      • Q(H);P_SPINS(G)
      • Threat
        • QAR(H)
      • Vars
        • R(c);CHECK,OGATE,XS(G)::QAB(H)+P(B),XR(c)
        • R(c);N_PINS(G),OGATE,P_SPINR(c),XP(B)::QAB1(H),XR(c)
      • Refutation
        • S(a);
    • Try
      • P(D);
      • Threat
        • QAR(H)
      • Vars
        • R(c);OGATE,P_PINQ(H),P_SPINR(c),XS(G)::QAR2(H),XR(c)
      • Refutation
        • B(e);
  • Actual
    • Q(H);P_SPINS(G)
    • Threat
      • QAR(H)
    • Vars
      • R(c);CHECK,OGATE,XS(G)::QAB(H)+P(C),XR(c)
      • R(c);N_PINS(G),OGATE,P_SPINR(c),XP(C)::QAB1(H),XR(c)
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Developed and maintained by Brian Stephenson.
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